Katherine E Sharpless

Summary

Affiliation: National Institute of Standards and Technology
Country: USA

Publications

  1. ncbi request reprint Value assignment of nutrient concentrations in standard reference material 2384 baking chocolate
    Katherine E Sharpless
    National Food Processors Association, 1350 I Street NW, Suite 300, Washington, DC 20005, USA
    J Agric Food Chem 50:7069-75. 2002
  2. ncbi request reprint Filling the AOAC triangle with food-matrix standard reference materials
    Katherine E Sharpless
    Analytical Chemistry Division, National Institute of Standards and Technology, 100 Bureau Drive Stop 8392, Gaithersburg, MD 20899 8392, USA
    Anal Bioanal Chem 378:1161-7. 2004
  3. ncbi request reprint Recent developments in food-matrix Reference Materials at NIST
    K E Sharpless
    National Institute of Standards and Technology, Gaithersburg, MD 20899 8392, USA
    Fresenius J Anal Chem 370:275-8. 2001
  4. ncbi request reprint Standard reference materials for analysis of dietary supplements
    Katherine E Sharpless
    National Institute of Standards and Technology, Analytical Chemistry Division, 100 Bureau Dr, Stop 8390, Gaithersburg, MD 20899 8390, USA
    J AOAC Int 91:1298-302. 2008
  5. ncbi request reprint Preparation and characterization of a suite of ephedra-containing standard reference materials
    Katherine E Sharpless
    National Institute of Standards and Technology, Analytical Chemistry Division, Gaithersburg, MD 20899 8390, USA
    J AOAC Int 89:1483-95. 2006
  6. ncbi request reprint Preparation and characterization of standard reference material 3276, carrot extract in oil
    Katherine E Sharpless
    Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899 8392, USA
    Anal Bioanal Chem 389:207-17. 2007
  7. ncbi request reprint Value assignment of nutrient and aflatoxin concentrations in standard reference material 2387 peanut butter
    Katherine E Sharpless
    National Institute of Standards and Technology, 100 Bureau Drive Stop 8392, Gaithersburg, Maryland 20899 8392, USA
    J Agric Food Chem 51:6745-51. 2003
  8. ncbi request reprint Determination of vitamins in food-matrix Standard Reference Materials
    K E Sharpless
    National Institute of Standards and Technology, Gaithersburg, MD 20899 8392, USA
    J Chromatogr A 881:171-81. 2000
  9. ncbi request reprint Standard reference materials for foods and dietary supplements
    Katherine E Sharpless
    Analytical Chemistry Division, National Institute of Standards and Technology, 100 Bureau Drive Stop 8390, Gaithersburg, MD 20899 8390, USA
    Anal Bioanal Chem 389:171-8. 2007
  10. ncbi request reprint Preparation and characterization of standard reference material 1849 infant/adult nutritional formula
    Katherine E Sharpless
    National Institute of Standards and Technology, Analytical Chemistry Division, Gaithersburg, MD 20899 8390, USA
    J AOAC Int 93:1262-74. 2010

Detail Information

Publications49

  1. ncbi request reprint Value assignment of nutrient concentrations in standard reference material 2384 baking chocolate
    Katherine E Sharpless
    National Food Processors Association, 1350 I Street NW, Suite 300, Washington, DC 20005, USA
    J Agric Food Chem 50:7069-75. 2002
    ..These assigned values were based on measurements by NIST and/or collaborating laboratories...
  2. ncbi request reprint Filling the AOAC triangle with food-matrix standard reference materials
    Katherine E Sharpless
    Analytical Chemistry Division, National Institute of Standards and Technology, 100 Bureau Drive Stop 8392, Gaithersburg, MD 20899 8392, USA
    Anal Bioanal Chem 378:1161-7. 2004
    ..They may also be used as "primary control materials" in the value-assignment of in-house, secondary, control materials to confirm accuracy as well as to establish traceability to NIST...
  3. ncbi request reprint Recent developments in food-matrix Reference Materials at NIST
    K E Sharpless
    National Institute of Standards and Technology, Gaithersburg, MD 20899 8392, USA
    Fresenius J Anal Chem 370:275-8. 2001
    ....
  4. ncbi request reprint Standard reference materials for analysis of dietary supplements
    Katherine E Sharpless
    National Institute of Standards and Technology, Analytical Chemistry Division, 100 Bureau Dr, Stop 8390, Gaithersburg, MD 20899 8390, USA
    J AOAC Int 91:1298-302. 2008
    ..These and other natural-matrix SRMs should be used in method validation, characterization of in-house quality control materials, and to establish traceability...
  5. ncbi request reprint Preparation and characterization of a suite of ephedra-containing standard reference materials
    Katherine E Sharpless
    National Institute of Standards and Technology, Analytical Chemistry Division, Gaithersburg, MD 20899 8390, USA
    J AOAC Int 89:1483-95. 2006
    ....
  6. ncbi request reprint Preparation and characterization of standard reference material 3276, carrot extract in oil
    Katherine E Sharpless
    Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899 8392, USA
    Anal Bioanal Chem 389:207-17. 2007
    ..This material is intended for use as a primary control material when assigning values to in-house (secondary) control materials and for validation of analytical methods for measurement of these analytes in similar matrices...
  7. ncbi request reprint Value assignment of nutrient and aflatoxin concentrations in standard reference material 2387 peanut butter
    Katherine E Sharpless
    National Institute of Standards and Technology, 100 Bureau Drive Stop 8392, Gaithersburg, Maryland 20899 8392, USA
    J Agric Food Chem 51:6745-51. 2003
    ..Aflatoxin levels in peanut butter are regulated by the Food and Drug Administration.)..
  8. ncbi request reprint Determination of vitamins in food-matrix Standard Reference Materials
    K E Sharpless
    National Institute of Standards and Technology, Gaithersburg, MD 20899 8392, USA
    J Chromatogr A 881:171-81. 2000
    ....
  9. ncbi request reprint Standard reference materials for foods and dietary supplements
    Katherine E Sharpless
    Analytical Chemistry Division, National Institute of Standards and Technology, 100 Bureau Drive Stop 8390, Gaithersburg, MD 20899 8390, USA
    Anal Bioanal Chem 389:171-8. 2007
    ..They may also be used as "primary control materials" in assignment of values to in-house (secondary) control materials to confirm accuracy and to establish measurement traceability to NIST...
  10. ncbi request reprint Preparation and characterization of standard reference material 1849 infant/adult nutritional formula
    Katherine E Sharpless
    National Institute of Standards and Technology, Analytical Chemistry Division, Gaithersburg, MD 20899 8390, USA
    J AOAC Int 93:1262-74. 2010
    ....
  11. doi request reprint Development of saw palmetto (Serenoa repens) fruit and extract standard reference materials
    Michele M Schantz
    Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
    Anal Bioanal Chem 392:427-38. 2008
    ..These SRMs will complement other reference materials currently available with concentrations for similar analytes and are part of a series of SRMs being developed for dietary supplements...
  12. doi request reprint Preparation and value assignment of standard reference material 968e fat-soluble vitamins, carotenoids, and cholesterol in human serum
    Jeanice B Thomas
    Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899 8392, USA
    Anal Bioanal Chem 402:749-62. 2012
    ..The value assignment of the analytes in this SRM will help support measurement accuracy and traceability for laboratories performing health-related measurements in the clinical and nutritional communities...
  13. pmc Dietary supplement laboratory quality assurance program: the first five exercises
    Melissa M Phillips
    National Institute of Standards and Technology, Analytical Chemistry Division, Material Measurement Laboratory, Gaithersburg, MD 20899 8392, USA
    J AOAC Int 94:803-14. 2011
    ..S. Food and Drug Administration. The DSQAP has conducted five exercises to date, with total participation including more than 75 different laboratories and many more individual analysts...
  14. ncbi request reprint Determination of caffeine and caffeine-related metabolites in ephedra-containing standard reference materials using liquid chromatography with absorbance detection and tandem mass spectrometry
    Jeanice B Thomas
    National Institute of Standards and Technology, Analytical Chemistry Division, Gaithersburg, MD 20899 8392, USA
    J AOAC Int 90:934-40. 2007
    ..These SRMs are primarily intended for method validation and for use as control materials to support the analysis of dietary supplements and similar materials...
  15. ncbi request reprint Determination of ephedrine alkaloids in dietary supplement standard reference materials
    Lane C Sander
    Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
    Anal Chem 77:3101-12. 2005
    ..The SRMs are primarily intended for method validation and for use as control materials to support the analysis of dietary supplements and related botanical materials...
  16. ncbi request reprint Characterization of a suite of ginkgo-containing standard reference materials
    Catherine A Rimmer
    National Institute of Standards and Technology, Gaithersburg, MD 20899 8392, USA
    Anal Bioanal Chem 389:179-96. 2007
    ..The SRMs are primarily intended for method validation and for use as control materials to support the analysis of dietary supplements and related botanical materials...
  17. doi request reprint Isotope dilution liquid chromatography - mass spectrometry methods for fat- and water-soluble vitamins in nutritional formulations
    Karen W Phinney
    Analytical Chemistry Division, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899, United States
    Anal Chem 83:92-8. 2011
    ..When possible, stable isotope labeled internal standards were employed for quantification...
  18. pmc Characterization of three berry standard reference materials for nutrients
    Laura J Wood
    National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
    J Agric Food Chem 59:7246-52. 2011
    ..Several nutritional elements in these three SRMs are present at lower levels than in other food-matrix SRMs...
  19. doi request reprint Determination of organic acids in Vaccinium berry standard reference materials
    Melissa M Phillips
    Analytical Chemistry Division, Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
    Anal Bioanal Chem 398:425-34. 2010
    ..The combined data from these methods was used for the assignment of organic acid levels in the seven candidate SRMs...
  20. ncbi request reprint Mass spectrometric determination of the predominant adrenergic protoalkaloids in bitter orange (Citrus aurantium)
    Bryant C Nelson
    Analytical Chemistry Division, Stop 8392, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899 8392, USA
    J Agric Food Chem 55:9769-75. 2007
    ..LC/MS/MS analysis of the protoalkaloids in the SRMs resulted in mean measurement imprecision levels of < or =10% coefficient of variation (% CV)...
  21. ncbi request reprint Determination of fat-soluble vitamins and carotenoids in standard reference material 3280 multivitamin/multielement tablets by liquid chromatography with absorbance detection
    Jeanice B Thomas
    National Institute of Standards and Technology, Analytical Chemistry Division, Gaithersburg, MD 20899 8392, USA
    J AOAC Int 94:815-22. 2011
    ..SRM 3280 is primarily intended for use in validating analytical methods for the determination of selected vitamins, carotenoids, and elements in multivitamin/multielement tablets and similar matrixes...
  22. doi request reprint Milk and serum standard reference materials for monitoring organic contaminants in human samples
    Michele M Schantz
    Analytical Chemistry Division, National Institute of Standards and Technology NIST, Gaithersburg, MD 20899, USA
    Anal Bioanal Chem 405:1203-11. 2013
    ..This agreement suggests that there were no significant biases existing among the multiple methods used for analysis...
  23. doi request reprint Commutability of NIST SRM 1955 Homocysteine and Folate in Frozen Human Serum with selected total homocysteine immunoassays and enzymatic assays
    Bryant C Nelson
    National Institute of Standards and Technology, Biochemical Science Division, Gaithersburg, MD 20899 0001, USA
    Clin Chim Acta 395:99-105. 2008
    ..NIST has performed an international, interlaboratory assessment of SRM 1955 commutability; results are reported for tHcy only...
  24. doi request reprint Demonstrating the comparability of certified reference materials
    David L Duewer
    Analytical Chemistry Division, National Institute of Standards and Technology NIST, 100 Bureau Drive, Stop 8390, Gaithersburg, MD 20899 8390, USA
    Anal Bioanal Chem 395:155-69. 2009
    ....
  25. ncbi request reprint Determination of caffeine, theobromine, and theophylline in standard reference material 2384, baking chocolate, using reversed-phase liquid chromatography
    Jeanice Brown Thomas
    United States Department of Commerce, National Institute of Standards and Technology, Chemical Science and Technology Laboratory, Gaithersburg, Maryland 20899 0001, USA
    J Agric Food Chem 52:3259-63. 2004
    ..1, 2.3, and 1.9%, respectively. The limit of quantitation for all analytes was <100 ng/mL. The measurements from this method were used in the value-assignment of caffeine, theobromine, and theophylline in SRM 2384...
  26. pmc Development and certification of a standard reference material for vitamin D metabolites in human serum
    Karen W Phinney
    Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
    Anal Chem 84:956-62. 2012
    ..Chromatographic resolution of the 3-epimer of 25(OH)D(3) proved to be essential for accurate determination of the metabolites...
  27. ncbi request reprint Improved liquid chromatography methods for the separation and quantification of biotin in NIST standard reference material 3280: multivitamin/multielement tablets
    Bryant C Nelson
    National Institute of Standards and Technology, Analytical Chemistry Division, Gaithersburg, Maryland 20899 0001, USA
    J Agric Food Chem 54:8710-6. 2006
    ....
  28. ncbi request reprint Quantitative determination of folic acid in multivitamin/multielement tablets using liquid chromatography/tandem mass spectrometry
    Bryant C Nelson
    National Institute of Standards and Technology, Analytical Chemistry Division, 100 Bureau Drive, Stop 8392, Gaithersburg, MD 20899 0001, USA
    J Chromatogr A 1135:203-11. 2006
    ..The FA measurement accuracy for both methods was > or =95% (based on the manufacturer's assessment of the FA level in SRM 3280) with corresponding measurement precision values (% RSD) of approximately 1%...
  29. ncbi request reprint Dietary supplement Standard Reference Materials
    Lane C Sander
    National Institute of Standards and Technology, MD 20899, USA
    Life Sci 78:2044-8. 2006
    ....
  30. doi request reprint Development of botanical and fish oil standard reference materials for fatty acids
    Michele M Schantz
    Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
    Anal Bioanal Chem 405:4531-8. 2013
    ..These SRMs will complement other reference materials currently available with mass fractions for similar analytes and are part of a series of SRMs being developed for dietary supplements...
  31. ncbi request reprint Determination of Bitter Orange alkaloids in dietary supplements standard reference materials by liquid chromatography with ultraviolet absorbance and fluorescence detection
    Karsten Putzbach
    Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
    J Chromatogr A 1156:304-11. 2007
    ..The method described was used for the assignment of the levels of the predominant alkaloids in three candidate standard reference materials containing Bitter Orange...
  32. ncbi request reprint Quantification of the predominant monomeric catechins in baking chocolate standard reference material by LC/APCI-MS
    Bryant C Nelson
    Analytical Chemistry Division, National Institute of Standards and Technology NIST, Gaithersburg, Maryland 20899 0001, USA
    J Agric Food Chem 51:531-7. 2003
    ....
  33. ncbi request reprint Development of a new standard reference material: SRM 1955 (homocysteine and folate in human serum)
    Mary B Satterfield
    Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
    Anal Bioanal Chem 385:612-22. 2006
    ..Use of the new SRM should improve clinical measurements and will permit traceability to internationally recognized certified reference materials, as described by European Directive 98/79/EC on in vitro diagnostic medical devices...
  34. doi request reprint An LC-ESI/MS method for determining theanine in green tea dietary supplements
    Mary Bedner
    Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899 8392, USA
    Anal Bioanal Chem 397:1773-7. 2010
    ..The theanine response was linear over several orders of magnitude, and excellent measurement precision was obtained for all three materials using the developed method...
  35. doi request reprint Development of liquid chromatographic methods for the determination of phytosterols in Standard Reference Materials containing saw palmetto
    Mary Bedner
    National Institute of Standards and Technology, Analytical Chemistry Division, MS 8392, Gaithersburg, MD 20899 8392, USA
    J Chromatogr A 1192:74-80. 2008
    ..This is the first reported use of LC-MS to determine phytosterols in saw palmetto dietary supplement materials...
  36. doi request reprint Certification of standard reference materials containing bitter orange
    L C Sander
    National Institute of Standards and Technology, Chemical Science and Technology Laboratory, 100 Bureau Drive, MS 8392, Gaithersburg, MD 20899 8392, USA
    Anal Bioanal Chem 391:2023-34. 2008
    ..The bitter-orange-containing dietary supplement SRMs are intended primarily for use as measurement controls and for use in the development and validation of analytical methods...
  37. ncbi request reprint Micronutrients Measurement Quality Assurance Program: helping participants use interlaboratory comparison exercise results to improve their long-term measurement performance
    D L Duewer
    Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
    Anal Chem 71:1870-8. 1999
    ..This report documents the semantic and graphical tools developed to help interlaboratory-comparison-exercise participants interpret their own measurement performance...
  38. ncbi request reprint NIST micronutrients measurement quality assurance program: characterizing individual participant measurement performance over time
    D L Duewer
    Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
    Anal Chem 72:3611-9. 2000
    ..We document and discuss recurrent patterns we observe in the measurement performance characteristics for M2QAP participants. The graphical analysis techniques utilized may be applicable to other interlaboratory comparison programs...
  39. ncbi request reprint NIST micronutrients measurement quality assurance program: characterizing the measurement community's performance over time
    D L Duewer
    Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 8394, USA
    Anal Chem 72:4163-70. 2000
    ..The reported measurement performance characteristics may be of interest to clinical, nutritional, and epidemiological studies involving any of these measurands. The data analysis techniques utilized may be applicable to other programs...
  40. ncbi request reprint The stability of retinol, alpha-tocopherol, trans-lycopene, and trans-beta-carotene in liquid-frozen and lyophilized serum
    J Brown Thomas
    Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
    Clin Chim Acta 276:75-87. 1998
    ..Retinol, alpha-tocopherol, trans-lycopene, and trans-beta-carotene in reconstituted lyophilized serum stored at -20 degrees C were stable for at least 3 days with minimal (< 5) freeze/thaw cycles...
  41. ncbi request reprint The certification of SRM 1546--Meat Homogenate, a new reference material for nutrients in a high protein, high fat matrix
    M J Welch
    Analytical Chemistry Division, United States Department of Commerce, Gaithersburg, MD 20899, USA
    Fresenius J Anal Chem 370:42-7. 2001
    ..SRM 1546 will provide laboratories with a means to evaluate the accuracy of the methods they use to assign nutrient levels to processed meats and similar products...
  42. ncbi request reprint Preparation and value assignment of Standard Reference Material 968c Fat-Soluble Vitamins, Carotenoids, and Cholesterol in Human Serum
    J Brown Thomas
    National Institute of Standards and Technology, Gaithersburg, MD 20899 8392, USA
    Clin Chim Acta 305:141-55. 2001
    ..The assigned values for cholesterol in the SRM are the means of results obtained using the NIST definitive method, gas chromatography-isotope dilution mass spectrometry...
  43. ncbi request reprint Certification of SRM 1589a PCBs, pesticides, PBDEs, and dioxins/furans in human serum
    Michele M Schantz
    Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
    Anal Bioanal Chem 389:1201-8. 2007
    ....
  44. doi request reprint Characterization of NIST food-matrix Standard Reference Materials for their vitamin C content
    Jeanice B Thomas
    Chemical Sciences Division, Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899 8392, USA
    Anal Bioanal Chem 405:4539-48. 2013
    ..Within-day precision of the LC method used to measure vitamin C in the food-matrix SRMs characterized in this study ranged from 2.7% to 6.5%...
  45. ncbi request reprint C30 stationary phases for the analysis of food by liquid chromatography
    L C Sander
    Analytical Chemistry Division, National Institute of Standards and Technology (NIST, Gaithersburg, MD 20899-8392, USA
    J Chromatogr A 880:189-202. 2000
    ..This report provides a comprehensive review of applications of polymeric C30 columns, utilized in the determination of carotenoids, retinoids, and other nutrients and related compounds in complex, natural-matrix samples...
  46. ncbi request reprint Committee on Food Nutrition
    David C Woollard
    AgriQuality NZ Ltd, Auckland, New Zealand
    J AOAC Int 88:371-2. 2005
  47. ncbi request reprint Determination of bitter orange alkaloids in dietary supplement Standard Reference Materials by liquid chromatography with atmospheric-pressure ionization mass spectrometry
    Karsten Putzbach
    RCC Ltd, Zelgliweg 1, CH 4452, Itingen, Switzerland
    Anal Bioanal Chem 389:197-205. 2007
    ..This method enabled the determination of the dominant alkaloid synephrine and other minor alkaloids in a variety of dietary supplement SRMs...
  48. ncbi request reprint Reference materials to evaluate measurement systems for the nutrient composition of foods: results from USDA's National Food and Nutrient Analysis Program (NFNAP)
    Katherine M Phillips
    Biochemistry Department, Virginia Polytechnic Institute and State University, 304 Engel Hall, Blacksburg, VA 24061, USA
    Anal Bioanal Chem 389:219-29. 2007
    ..For Na almost all high Z'-scores were for low-Na matrices, suggesting analytical problems related to concentration. Figure Z'-scores for vitamins in certified reference materials...
  49. ncbi request reprint Measuring vitamins and minerals in dietary supplements for nutrition studies in the USA
    Johanna T Dwyer
    Office of Dietary Supplements, National Institutes of Health, US Department of Health and Human Services, Bethesda, MD 20892, USA
    Anal Bioanal Chem 389:37-46. 2007
    ..The DSID should be helpful to researchers in assessing relationships between intakes of vitamins and minerals and health outcomes...