Search Results - "AOYAGI, Yoshie"

Evaluation of the impact of matrix effect on quantification of pesticides in foods by gas chromatography–mass spectrometry using isotope-labeled internal standards by Yarita, Takashi, Aoyagi, Yoshie, Otake, Takamitsu

“…•Matrix effect in GC–MS evaluated using isotope-labeled internal standards.•Matrix-free calibration solution results were biased from spiked…”
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Assessment of the long-term stability of pesticide residues under freezing conditions in brown rice and soybean certified reference materials by Otake, Takamitsu, Aoyagi, Yoshie, Yarita, Takashi

“…The objective of this study was to assess the long-term stability of pesticide residues in brown rice and soybean. The long-term stability of pesticide…”
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A Certified Reference Material of Polyvinyl Chloride Containing Phthalic Esters (NMIJ CRM 8156-a) for Screening Device Applications by Hanari, Nobuyasu, Orihara, Yukari, Aoyagi, Yoshie, Matsuyama, Shigetomo

“…Phthalic esters (PEs) are used as plasticizers for plastic products especially for polyvinyl chloride (PVC). Owing to their adverse effects on human health,…”
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A reference material (NMIJ RM 4076-a) for the determination of short-chain chlorinated paraffins by Hanari, Nobuyasu, Aoyagi, Yoshie, Orihara, Yukari

“…Chlorinated paraffins are primary industrial chemical products used for metalworking fluids and flame retardants. However, short-chain chlorinated paraffins…”
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Proficiency testing by the National Metrology Institute of Japan for quantification of pesticide residues in grain samples from 2012 to 2018 by Otake, Takamitsu, Yarita, Takashi, Aoyagi, Yoshie, Hanari, Nobuyasu, Takatsu, Akiko

“…From 2012 to 2018, proficiency testings (PTs) were carried out to support the analytical skill development of participants. Grains were sprayed with various…”
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Optimization of the dopant for the trace determination of polycyclic aromatic hydrocarbons by liquid chromatography/dopant-assisted atmospheric-pressure photoionization/mass spectrometry by Itoh, Nobuyasu, Aoyagi, Yoshie, Yarita, Takashi

“…The composition of the dopant for the analysis of polycyclic aromatic hydrocarbons (PAHs) by liquid chromatography/dopant-assisted atmospheric-pressure…”
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Evaluation of the performance of 57 Japanese participating laboratories by two types of z-scores in proficiency test for the quantification of pesticide residues in brown rice by Otake, Takamitsu, Yarita, Takashi, Aoyagi, Yoshie, Numata, Masahiko, Takatsu, Akiko

“…A proficiency test for the analysis of pesticide residues in brown rice was carried out to support upgrading in analytical skills of participant laboratories…”
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Proficiency testing for determination of pesticide residues in soybean: Comparison of assigned values from participants׳ results and isotope-dilution mass spectrometric determination by Yarita, Takashi, Otake, Takamitsu, Aoyagi, Yoshie, Kuroiwa, Takayoshi, Numata, Masahiko, Takatsu, Akiko

“…Proficiency testing (PT) for the determination of pesticide residues in soybean samples was organized by the National Metrology Institute of Japan (NMIJ). The…”
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Comparison of Assigned Values from Participants' Results, Spiked Concentrations of Test Samples, and Isotope Dilution Mass Spectrometric Results in Proficiency Testing for Pesticide Residue Analysis by Yarita, Takashi, Otake, Takamitsu, Aoyagi, Yoshie, Takasaka, Noriko, Suzuki, Tatsuya, Watanabe, Takaho

“…The Hatano Research Institute (HRI) at the Food and Drug Safety Center has recently organized a series of proficiency-testing (PT) programs called the…”
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Difference between Consensus Value of Participants’ Results and Isotope-Dilution Mass Spectrometric Results in Proficiency Testing for Pesticide Residues in Husked Wheat by YARITA, Takashi, OTAKE, Takamitsu, AOYAGI, Yoshie, NUMATA, Masahiko, TAKATSU, Akiko

“…Proficiency testing was organized by the National Metrology Institute of Japan (NMIJ) as a measure of analytical competency in the quantification of pesticide…”
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Comparison of low-level polycyclic aromatic hydrocarbons in sediment revealed by Soxhlet extraction, microwave-assisted extraction, and pressurized liquid extraction by Itoh, Nobuyasu, Numata, Masahiko, Aoyagi, Yoshie, Yarita, Takashi

“…We analyzed polycyclic aromatic hydrocarbons (PAHs) present in lake sediment at low levels (<1 μg g −1) by using Soxhlet extraction (Soxhlet),…”
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Separation of Parabens on a Zirconia-Based Stationary Phase in Superheated Water Chromatography by YARITA, Takashi, AOYAGI, Yoshie, SASAI, Haruka, NISHIGAKI, Atsuko, SHIBUKAWA, Masami

“…A superheated water chromatography (SWC) method for the separation of alkyl esters of 4-hydroxybenzoic acid (parabens) using a zirconia-based stationary phase…”
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Development of Certified Reference Material for Quantification of Two Pesticides in Brown Rice by Otake, Takamitsu, Itoh, Nobuyasu, Aoyagi, Yoshie, Matsuo, Mayumi, Hanari, Nobuyasu, Otsuka, Satoko, Yarita, Takashi

“…Brown rice powder certified reference material, NMIJ CRM 7504-a, for the analysis of pesticide residues was developed by the National Metrology Institute of…”
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Characterization of certified reference material for quantification of polychlorinated biphenyls and organochlorine pesticides in fish by Otake, Takamitsu, Aoyagi, Yoshie, Yarita, Takashi, Numata, Masahiko

“…Fish certified reference material (CRM), NMIJ CRM 7404-a, for the analysis of polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) was…”
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Development of Green Onion and Cabbage Certified Reference Materials for Quantification of Organophosphorus and Pyrethroid Pesticides by Otake, Takamitsu, Yarita, Takashi, Aoyagi, Yoshie, Kuroda, Youko, Numata, Masahiko, Iwata, Hitoshi, Mizukoshi, Kazushi, Nakamura, Munetomo, Watai, Masatoshi, Mitsuda, Hitoshi, Fujikawa, Takashi, Ota, Hidekazu

“…Green onion and cabbage certified reference materials for the analysis of pesticide residues were issued by the National Metrology Institute of Japan, part of…”
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Certified reference material for quantification of polycyclic aromatic hydrocarbons in sediment from the National Metrology Institute of Japan by Itoh, Nobuyasu, Aoyagi, Yoshie, Takatsu, Akiko, Yarita, Takashi

“…The National Metrology Institute of Japan has issued a certified reference material (CRM) of freshwater lake sediment for polycyclic aromatic hydrocarbon…”
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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 Japan by Itoh, Nobuyasu, Inagaki, Kazumi, Narukawa, Tomohiro, Aoyagi, Yoshie, Narushima, Izumi, Koguchi, Masae, Numata, Masahiko

“…The National Metrology Institute of Japan has issued a certified reference material of tunnel dust for polycyclic aromatic hydrocarbons (PAHs) and toxic…”
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Preparation of Sulfoxide Residue Bonded Silica Stationary Phase for Separation of Polychlorinated Biphenyls from Mineral Oils by Numata, Masahiko, Aoyagi, Yoshie, Tsuda, Yoko, Yarita, Takashi, Takatsu, Akiko

“…In this study, a sulfoxide residue bonded silica stationary phase was prepared for the separation of polychlorinated biphenyls (PCBs) from mineral oils, and…”
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Effect of residues remaining in the injection liner of a gas chromatograph on the quantification of polycyclic aromatic hydrocarbons by isotope dilution mass spectrometry using deuterium-labeled internal standards by Itoh, Nobuyasu, Numata, Masahiko, Aoyagi, Yoshie, Yarita, Takashi

“…We have investigated the differences in response ratios of native polycyclic aromatic hydrocarbons (native PAHs)/ 13C-labeled PAHs ( 13C-PAHs) and of native…”
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Certified calibration solution reference material for the determination of perfluorooctane sulfonate from the National Metrology Institute of Japan (NMIJ) by Hanari, Nobuyasu, Itoh, Nobuyasu, Ishikawa, Keiichiro, Iwasawa, Ryoko, Aoyagi, Yoshie, Yarita, Takashi, Numata, Masahiko

“…A new calibration solution reference material for the determination of perfluorooctane sulfonate anion (PFOS) and its salts has been issued as a certified…”
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