Research Topics
| Tomohiro NarukawaSummaryAffiliation: National Institute of Advanced Industrial Science and Technology Country: Japan Publications
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Detail Information
Publications
Aqueous extraction of water-soluble inorganic arsenic in marine algae for speciation analysisTomohiro Narukawa
National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
Anal Sci 28:773-9. 2012..The proposed method is appropriate for environmental monitoring for inorganic As speciation in algae...
Speciation and monitoring test for inorganic arsenic in white rice flourTomohiro Narukawa
Inorganic Analytical Chemistry Division, National Metrology Institute of Japan NMIJ, National Institute of Advanced Industrial Science and Technology AIST, Tsukuba, Ibaraki, Japan
J Agric Food Chem 60:1122-7. 2012..15 ± 0.07 mg kg(-1) (highest, 0.32 mg kg(-1)), which is very low. It was thus confirmed that the white rice flour samples collected in this experiment were not suffered from noticeable As contamination...- Heat-assisted aqueous extraction of rice flour for arsenic speciation analysisTomohiro Narukawa
National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
J Agric Food Chem 58:8183-8. 2010..The sums of the concentrations of all species in each rice flour sample were 97-102% of the total arsenic concentration in each sample... - Effect of the chemical species of arsenic on sensitivity in graphite furnace atomic absorption spectrometryTomohiro Narukawa
National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Umezono, Tsukuba, Ibaraki, Japan
Anal Sci 24:355-60. 2008..Moreover, it was observed that some co-existing organic materials enhanced the analytical sensitivity of inorganic As. The sensitivity difference between inorganic As and AB depended upon the mechanisms of their atomization processes... - The extraction and speciation of arsenic in rice flour by HPLC-ICP-MSTomohiro Narukawa
Inorganic Analytical Chemistry Division, National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 3, 1 1 1 Umezono, Tsukuba, Ibaraki, 305 8563, Japan
Talanta 77:427-32. 2008..Arsenite [As(III)], arsenate [As(V)] and dimethylarsinic acid (DMAA) were the main species detected in rice flour samples... - Preparation and certification of hijiki reference material, NMIJ CRM 7405-a, from the edible marine algae hijiki (Hizikia fusiforme)Tomohiro Narukawa
Environmental Standard Section, National Metrology Institute of Japan NMIJ, National Institute of Advanced Industrial Science and Technology AIST, Tsukuba Central 3, 1 1 1 Umezono, Tsukuba, Ibaraki 305 8563, Japan
Anal Bioanal Chem 402:1713-22. 2012..The uncertainties of all the measurements and preparation procedures were evaluated. The values of 18 trace elements and As(V) in the CRM were certified with uncertainty (k = 2)... - Certification of methylmercury in cod fish tissue certified reference material by species-specific isotope dilution mass spectrometric analysisKazumi Inagaki
Environmental Standard Section, National Metrology Institute of Japan, Umezono 1 1 1, Tsukuba Central 3, Tsukuba, Ibaraki, 305 8563, Japan
Anal Bioanal Chem 391:2047-54. 2008..The certified value given for MeHg is 0.58 +/- 0.02 mg kg(-1) as Hg... - Development of a certified reference material (NMIJ CRM 7512-a) for the determination of trace elements in milk powderYanbei Zhu
National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
Anal Sci 29:247-53. 2013..The concentrations of As (2.1 μg kg(-1)), Cd (0.2 μg kg(-1)), Cr (1.3 μg kg(-1)), Pb (0.3 μg kg(-1)), and Y (64 μg kg(-1)) were given as information values for the present CRM... - Preparation and certification of arsenobetaine reference material NMIJ CRM 7901-aTomohiro Narukawa
Environmental Standard Section, National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 3, 1 1 1 Umezono, Tsukuba, Ibaraki 305 8563, Japan
Anal Bioanal Chem 389:661-6. 2007..The arsenobetaine concentration in the CRM was thus certified... - Development of a certified reference material (NMIJ CRM 7531-a) for the determination of trace cadmium and other elements in brown rice flourShin Ichi Miyashita
Environmental Standards Section, National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305 8563, Japan
Anal Sci 28:1171-7. 2012..The range of the relative combined standard uncertainties was from 1.1% of Zn to 1.6% of As... - Preparation and certification of arsenate [As(V)] reference material, NMIJ CRM 7912-aTomohiro Narukawa
Environmental Standard Section, National Metrology Institute of Japan NMIJ, National Institute of Advanced Industrial Science and Technology AIST, Tsukuba Central 3, 1 1 1 Umezono, Tsukuba, Ibaraki, 305 8563, Japan
Anal Bioanal Chem 397:493-9. 2010..The uncertainties of all the measurements and preparation procedures were evaluated. The certified value of As(V) in the CRM is (99.53 +/- 1.67) mg kg(-1) (k = 2)... - Development of a certified reference material (NMIJ CRM 7505-a) for the determination of trace elements in tea leavesYanbei Zhu
Environmental Standard Section, National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
Anal Sci 27:1149-55. 2011..The range of the relative combined standard uncertainties was from 1.5% of Mg and K to 4.1% of Cd... - Accurate determination of arsenic in arsenobetaine standard solutions of BCR-626 and NMIJ CRM 7901-a by neutron activation analysis coupled with internal standard methodTsutomu Miura
National Metrology Institute of Japan, AIST, Tsukuba Central 3, 1 1 1 Umezono, Tsukuba, Ibaraki 305 8563, Japan
Talanta 82:1143-8. 2010..These values were found to be 15-20% higher than the certified values. The between-bottle variation of BCR-626 was much larger than the expanded uncertainty of the certified value, although that of NMIJ CRM 7901-a was almost negligible... - Determination of cadmium in grains by isotope dilution ICP-MS and coprecipitation using sample constituents as carrier precipitantsKazumi Inagaki
Environmental Standards Section, National Metrology Institute of Japan NMIJ, National Institute of Advanced Industrial Science and Technology, Tsukuba central 3 10, Umezono 1 1 1, Tsukuba, Ibaraki 305 8563, Japan
Anal Bioanal Chem 389:691-6. 2007..Good analytical results with small uncertainties were obtained for all samples. This method is simple and reliable for the determination of Cd in grain samples by ID-ICPMS... - Investigation on chemical species of arsenic, selenium and antimony in fly ash from coal fuel thermal power stationsTomohiro Narukawa
Inorganic Analytical Chemistry Division, National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 3, 1-1-1 UmezonoTsukuba, Ibaraki, 305-8563, Japan
J Environ Monit 7:1342-8. 2005..The main species of Se was Se(IV), although it was found that the ratio of Se(VI) to Se(IV) in acidic fly ashes is higher than in alkaline fly ash samples. Antimony was mostly present as Sb(III)... - Certified reference material for quantification of polycyclic aromatic hydrocarbons and toxic elements in tunnel dust (NMIJ CRM 7308-a) from the National Metrology Institute of JapanNobuyasu Itoh
National Metrology Institute of Japan NMIJ, National Institute of Advanced Industrial Science and Technology AIST, Tsukuba, Ibaraki, Japan
Anal Bioanal Chem 401:2909-18. 2011..Certified values of five toxic elements (Cr, Ni, Pb, Mn, and Cd) obtained from microwave-assisted digestions and a combination of measurement techniques are also provided between 43.4 and 10.71 × 10(3) mg/kg... - Quantification of oligonucleotide containing sequence failure product: comparison of isotope dilution mass spectrometry with other quantification methodsTomoya Kinumi
National Metrology Institute of Japan NMIJ, National Institute of Advanced Industrial Science and Technology AIST, Tsukuba, Ibaraki 305 8563, Japan
Eur J Mass Spectrom (Chichester, Eng) 15:399-407. 2009.... - Cancer risk to Japanese population from the consumption of inorganic arsenic in cooked hijikiYuko Nakamura
School of Allied Health Sciences, Kitasato University, Sagamihara, Kanagawa, Japan
J Agric Food Chem 56:2536-40. 2008..0 x 10(-4)), which exceeded the acceptable level of 10(-5). Taking the risk of other cancers (bladder, lung, etc.) into consideration, the contribution to cancer occurrence through the consumption of hijiki seaweed may not be negligible...