T B Whitaker

Summary

Affiliation: North Carolina State University
Country: USA

Publications

  1. ncbi request reprint Sampling foods for mycotoxins
    T B Whitaker
    US Department of Agriculture, Agricultural Research Service, North Carolina State University, Box 7625, Raleigh, NC 27695 7625, USA
    Food Addit Contam 23:50-61. 2006
  2. ncbi request reprint Evaluating the performance of sampling plans to detect fumonisin B1 in maize lots marketed in Nigeria
    Thomas B Whitaker
    U S Department of Agriculture, Agricultural Research Service, Box 7625, North Carolina State University, Raleigh, NC, USA
    J AOAC Int 90:1050-9. 2007
  3. ncbi request reprint Correlation between aflatoxin contamination and various USDA grade categories of shelled almonds
    Thomas B Whitaker
    U S Department of Agriculture, Agricultural Research Service, North Carolina State University, Biological and Agricultural Engineering Department, Box 7625, Raleigh, NC 27695 7625, USA
    J AOAC Int 93:943-7. 2010
  4. doi request reprint Sampling and analytical variability associated with the determination of aflatoxins and ochratoxin A in bulk lots of powdered ginger marketed in 1-lb bags
    Thomas B Whitaker
    US Department of Agriculture, ARS, North Carolina State University, P O Box 7625, Raleigh, NC 27695 7625, USA
    Anal Bioanal Chem 395:1291-9. 2009
  5. ncbi request reprint Evaluating the performance of sampling plans to detect hypoglycin A in ackee fruit shipments imported into the United States
    Thomas B Whitaker
    U S Department of Agriculture, Agricultural Research Service, Box 7625, North Carolina State University, Raleigh, NC 27695 7625, USA
    J AOAC Int 90:1060-72. 2007
  6. ncbi request reprint Sampling almonds for aflatoxin, part II: estimating risks associated with various sampling plan designs
    Thomas B Whitaker
    U S Department of Agriculture, Agricultural Research Service, North Carolina State University, Box 7625, Raleigh, NC 27695 7625, USA
    J AOAC Int 90:778-85. 2007
  7. ncbi request reprint Sampling almonds for aflatoxin, part I: estimation of uncertainty associated with sampling, sample preparation, and analysis
    Thomas B Whitaker
    Agricultural Research Service, Department of Agriculture, Box 7625, North Carolina State University, Raleigh, NC 27695 7625, USA
    J AOAC Int 89:1027-34. 2006
  8. ncbi request reprint Immunochemical analytical methods for the determination of peanut proteins in foods
    Thomas B Whitaker
    U S Department of Agriculture, Agricultural Research Service, Box 7625, North Carolina State University, Raleigh, NC 27695 7625, USA
    J AOAC Int 88:161-74. 2005
  9. ncbi request reprint Evaluation of sampling plans to detect Cry9C protein in corn flour and meal
    Thomas B Whitaker
    U S Department of Agriculture, Agricultural Research Service, North Carolina State University, Raleigh, NC 27695 7625, USA
    J AOAC Int 87:950-60. 2004
  10. ncbi request reprint Estimating deoxynivalenol in shelled corn barge lots by measuring deoxynivalenol in corn screenings
    Thomas B Whitaker
    US Department of Agriculture, Agricultural Research Service, PO Box 7625, North Carolina State University, Raleigh, NC 27695 7625, USA
    J AOAC Int 86:1187-92. 2003

Collaborators

Detail Information

Publications24

  1. ncbi request reprint Sampling foods for mycotoxins
    T B Whitaker
    US Department of Agriculture, Agricultural Research Service, North Carolina State University, Box 7625, Raleigh, NC 27695 7625, USA
    Food Addit Contam 23:50-61. 2006
    ..Methods to reduce sampling, sample preparation and analytical variability are discussed...
  2. ncbi request reprint Evaluating the performance of sampling plans to detect fumonisin B1 in maize lots marketed in Nigeria
    Thomas B Whitaker
    U S Department of Agriculture, Agricultural Research Service, Box 7625, North Carolina State University, Raleigh, NC, USA
    J AOAC Int 90:1050-9. 2007
    ..The performance of several sampling plan designs was evaluated to demonstrate how to manipulate sample size and accept/reject limits to reduce misclassification of maize lots...
  3. ncbi request reprint Correlation between aflatoxin contamination and various USDA grade categories of shelled almonds
    Thomas B Whitaker
    U S Department of Agriculture, Agricultural Research Service, North Carolina State University, Biological and Agricultural Engineering Department, Box 7625, Raleigh, NC 27695 7625, USA
    J AOAC Int 93:943-7. 2010
    ..Regression equations demonstrated that aflatoxin mass only in the insect damaged kernels was also an effective way to predict the aflatoxin concentration in each 12 000 g sample...
  4. doi request reprint Sampling and analytical variability associated with the determination of aflatoxins and ochratoxin A in bulk lots of powdered ginger marketed in 1-lb bags
    Thomas B Whitaker
    US Department of Agriculture, ARS, North Carolina State University, P O Box 7625, Raleigh, NC 27695 7625, USA
    Anal Bioanal Chem 395:1291-9. 2009
    ..Equations are derived to show the effect of increasing laboratory sample size and/or number of aliquots on reducing the variability of the test procedures used to estimate OTA and AF in powdered ginger...
  5. ncbi request reprint Evaluating the performance of sampling plans to detect hypoglycin A in ackee fruit shipments imported into the United States
    Thomas B Whitaker
    U S Department of Agriculture, Agricultural Research Service, Box 7625, North Carolina State University, Raleigh, NC 27695 7625, USA
    J AOAC Int 90:1060-72. 2007
    ..The performance of several sampling plan designs was evaluated to demonstrate how to manipulate sample size and accept/reject limits to reduce misclassification of ackee fruit lots...
  6. ncbi request reprint Sampling almonds for aflatoxin, part II: estimating risks associated with various sampling plan designs
    Thomas B Whitaker
    U S Department of Agriculture, Agricultural Research Service, North Carolina State University, Box 7625, Raleigh, NC 27695 7625, USA
    J AOAC Int 90:778-85. 2007
    ..By using the variance and distribution information, operating characteristics curves were developed to predict the effect of sample size and accept/reject limits on the probability of rejecting good lots and accepting bad lots...
  7. ncbi request reprint Sampling almonds for aflatoxin, part I: estimation of uncertainty associated with sampling, sample preparation, and analysis
    Thomas B Whitaker
    Agricultural Research Service, Department of Agriculture, Box 7625, North Carolina State University, Raleigh, NC 27695 7625, USA
    J AOAC Int 89:1027-34. 2006
    ..7 (CV, 132.4%), 14.7 (CV, 25.5%), 0.8 (CV, 6.1%), and 410.2 (CV, 135.0%), respectively. The percentages of the total variance associated with sampling, sample preparation, and analytical steps were 96.2, 3.6, and 0.2, respectively...
  8. ncbi request reprint Immunochemical analytical methods for the determination of peanut proteins in foods
    Thomas B Whitaker
    U S Department of Agriculture, Agricultural Research Service, Box 7625, North Carolina State University, Raleigh, NC 27695 7625, USA
    J AOAC Int 88:161-74. 2005
    ..The normalization method adjusts measured protein values to equal the true protein value regardless of the type test kit or type food matrix...
  9. ncbi request reprint Evaluation of sampling plans to detect Cry9C protein in corn flour and meal
    Thomas B Whitaker
    U S Department of Agriculture, Agricultural Research Service, North Carolina State University, Raleigh, NC 27695 7625, USA
    J AOAC Int 87:950-60. 2004
    ..Operating characteristic curves were developed and used to demonstrate the effect of increasing sample size on reducing false positives (seller's risk) and false negatives (buyer's risk)...
  10. ncbi request reprint Estimating deoxynivalenol in shelled corn barge lots by measuring deoxynivalenol in corn screenings
    Thomas B Whitaker
    US Department of Agriculture, Agricultural Research Service, PO Box 7625, North Carolina State University, Raleigh, NC 27695 7625, USA
    J AOAC Int 86:1187-92. 2003
    ..359. The coefficient of variation (CV) associated with predicting the DON concentration in a lot with 359 ng/g using a 1.1 kg test sample was 47.0%. Increasing sample size to 4.4 kg reduced the CV to 23%...
  11. ncbi request reprint Sampling grain shipments to detect genetically modified seed
    T B Whitaker
    USDA ARS, North Carolina State University, Raleigh 27695 7625, USA
    J AOAC Int 84:1941-6. 2001
    ..Using an accept/reject limit above the regulatory tolerance decreases the seller's risk but increases the buyer's risk...
  12. ncbi request reprint Distribution among sample test results when testing shelled corn lots for fumonisin
    T B Whitaker
    USDA-ARS, North Carolina State University, Raleigh 27695-7625, USA
    J AOAC Int 84:770-6. 2001
    ..An operating characteristic curve was developed for a fumonisin sampling plan to demonstrate the use of the compound gamma function...
  13. ncbi request reprint Investigations of the problems of assessing aflatoxin levels in peanuts
    F G Giesbrecht
    Department of Statistics, North Carolina State University, Raleigh 27695 8203, USA
    Biometrics 54:739-53. 1998
    ..In the negative binomial, the two parameters can be used as measures of mean or location and shape...
  14. ncbi request reprint Sampling uncertainties for the detection of chemical agents in complex food matrices
    Thomas B Whitaker
    Agricultural Research Service, U S Department of Agriculture, Box 7625, North Carolina State University, Raleigh, North Carolina 27695 7625, USA
    J Food Prot 68:1306-13. 2005
    ....
  15. ncbi request reprint Detecting mycotoxins in agricultural commodities
    Thomas B Whitaker
    USDA ARS, Box 7625, North Carolina State University, Raleigh, NC 27695 7625, USA
    Mol Biotechnol 23:61-71. 2003
    ..Methods to reduce sampling, sample preparation, and analytical variability are discussed...
  16. ncbi request reprint Predicting aflatoxin and fumonisin in shelled corn lots using poor-quality grade components
    Anders S Johansson
    U S Department of Agriculture Agricultural Research Service, North Carolina State University, Campus Box 7625, Raleigh, NC 27529 7625, USA
    J AOAC Int 89:433-40. 2006
    ..This study indicated that measuring either aflatoxin or fumonisin in the combined DM and BCFM grade components could be used as a screening method to predict either aflatoxin or fumonisin in a bulk lot of shelled corn...
  17. ncbi request reprint Sampling wheat for deoxynivalenol
    Thomas B Whitaker
    U S Department of Agriculture, Agricultural Research Service, North Carolina State University, Raleigh 27695 7625, USA
    Adv Exp Med Biol 504:73-83. 2002
    ..Even with the use of a small sample size (0.454 kg), the sampling variation was not the largest source of error as found in other mycotoxin test procedures...
  18. ncbi request reprint Testing green coffee for ochratoxin A, part II: Observed distribution of ochratoxin A test results
    Eugenia Azevedo Vargas
    Ministerio da Agricultura, Pecuária e Abastecimento, Laboratório de Controle de Qualidade e Segurança Alimentar, Av Raja Gabaglia, 245, Cidade Jardim, Belo Horizonte, MG, CEP 30380 090, Brazil
    J AOAC Int 88:780-7. 2005
    ..The percent-contaminated beans were a function of the lot concentration and increased with lot concentration. At a lot concentration of 5 microg/kg, approximately 6 beans per 10,000 beans are contaminated...
  19. ncbi request reprint Determining the variability associated with testing shelled corn for aflatoxin using different analytical procedures in Louisiana in 1998
    Douglas L Park
    Louisiana State University Agricultural Center, Department of Food Science, Baton Rouge, LA 70803, USA
    J AOAC Int 90:1036-41. 2007
    ..The sampling and sample preparation steps accounted for about 91.5% of the total variability. When using the HPLC analytical method, the analytical step contributed only 8.5% to the total variance...
  20. ncbi request reprint Sampling hazelnuts for aflatoxin: effect of sample size and accept/reject limit on reducing the risk of misclassifying lots
    Guner Ozay
    TUBITAK Marmara Research Center, Food Institute, PO Box 21, 41470 Gebze Kocaeli, Turkey
    J AOAC Int 90:1028-35. 2007
    ..The effect of sample size and accept/reject limits on the chances of rejecting good lots (sellers' risk) and accepting bad lots (buyers' risk) was demonstrated for various sampling plan designs...
  21. ncbi request reprint Testing green coffee for ochratoxin A, part I: estimation of variance components
    Eugenia A Vargas
    Ministerio da Agricultura, Pecuária e Abastecimento, Laboratório de Controle de Qualidade e Segurança Alimentar LAV MG, Av Raja Gabaglia, Cidade Jardim, Belo Horizonte, Minas Gerais, Brazil
    J AOAC Int 87:884-91. 2004
    ..75 (coefficient of variation [CV] = 65.6%), 7.80 (CV = 55.8%), 2.84 (CV = 33.7%), and 0.11 (CV = 6.6%), respectively. The total variance for sampling, sample preparation, and analytical were 73, 26, and 1%, respectively...
  22. ncbi request reprint Testing green coffee for ochratoxin A, part III: performance of ochratoxin A sampling plan
    Eugenia A Vargas
    Ministerio da Agricultura, Pecuária e Abastecimento, Laboratório de Controle de Qualidade e Segurança Alimentar LAV MQ Av Raja Gabaglia, 245, Cidade Jardim, 30380 090, Belo Horizonte, Minas Gerais, Brazil
    J AOAC Int 89:1021-6. 2006
    ..As a result, decreasing the accept/reject limit below the regulatory limit increased the number of good lots rejected (sellers' risk), but decreased the number of bad lots accepted (buyers' risk)...
  23. ncbi request reprint Sampling hazelnuts for aflatoxin: uncertainty associated with sampling, sample preparation, and analysis
    Guner Ozay
    TUBITAK Marmara Research Center, Food Institute, PO Box 21 41470 Gebze, Kocaeli, Turkey
    J AOAC Int 89:1004-11. 2006
    ..40, 0.74, and 0.27, respectively. The sampling, sample preparation, and analytical steps of the aflatoxin test procedure accounted for 99.4, 0.4, and 0.2% of the total variability, respectively...
  24. ncbi request reprint Variation of analytical results for peanuts in energy bars and milk chocolate
    Mary W Trucksess
    U S Food and Drug Administration, Center for Food Safety and Applied Nutrition, College Park, MD 20740, USA
    J AOAC Int 87:943-9. 2004
    ..This study serves as a template for application to other foods, and for extrapolation to different sizes of samples and subsamples as well as numbers of analyses...