TY - JOUR AU - Luo, Qing AU - Gao, Xu AU - Hu, Yuanan AU - Lin, Kunde AU - Wang, Xuejun AU - Cheng, Hefa TI - Determination of methylmercury in rice using microwave-assisted extraction coupled with thermal decomposition amalgamation atomic absorption spectrometry (MAE-TDA-AAS) JF - ANALYTICAL METHODS: ADVANCING METHODS AND APPLICATIONS J2 - ANAL METHOD VL - 11 PY - 2019 IS - 10 SP - 1361 EP - 1370 PG - 10 SN - 1759-9660 DO - 10.1039/c8ay02738b UR - https://m2.mtmt.hu/api/publication/31102875 ID - 31102875 AB - This work developed a method for rapid determination of methylmercury (MeHg) in rice, a staple cereal widely consumed in Asia, based on microwave-assisted extraction coupled with thermal decomposition amalgamation atomic absorption spectrometry (MAE-TDA-AAS). Orthogonal design was applied to optimize the parameters of MAE, and the optimal conditions were found to be as follows: 1.5 g of rice powder extracted using 12 mL toluene and 6 mL 30% HCl solution at 110 degrees C for 5 min under microwave irradiation. MeHg extracted into the organic phase (4.0 mL) was then back-extracted into 2.0 mL 1.5% L-cysteine solution, followed by quantitation by TDA-AAS on a direct mercury analyzer. The MeHg recovery rate of this method determined from a spiked rice sample was 80.8% (77.5-84.1%, 95% confidence limits), while those for MeHg in certified reference materials, TORT-2 and SRM-2976, were 97.6% (91.0-104.1%, 95% confidence limits) and 93.8% (90.4-97.2%, 95% confidence limits), respectively. The limit of detection and limit of quantification for MeHg in rice were 0.13 and 0.43 ng g(-1), respectively, and the relative standard deviation was below 5%. The extracts of 15 rice samples collected from two provinces in China were analyzed by both TDA-AAS and the well-developed high performance liquid chromatography coupled with inductively coupled plasma-mass spectrometry (HPLC-ICP-MS) method, and comparable results were obtained. Overall, these findings demonstrate that the MAE-TDA-AAS method developed in this study is a convenient and reliable method for quick determination of MeHg in rice and probably other food grains, and it is an order of magnitude more sensitive than the previous methods established for analysis of mercury species in fish and seafood. LA - English DB - MTMT ER - TY - JOUR AU - Jung, SA AU - Chung, D AU - On, J AU - Moon, MH AU - Lee, J AU - Pyo, H TI - Correlation between total mercury and methyl mercury-in whole blood of South Korean JF - BULLETIN OF THE KOREAN CHEMICAL SOCIETY J2 - B KOR CHEM SOC VL - 34 PY - 2013 IS - 4 SP - 1101 EP - 1107 PG - 7 SN - 0253-2964 DO - 10.5012/bkcs.2013.34.4.1101 UR - https://m2.mtmt.hu/api/publication/26085173 ID - 26085173 LA - English DB - MTMT ER - TY - JOUR AU - Chung, S W C AU - Chan, B T P TI - A reliable method to determine methylmercury and ethylmercury simultaneously in foods by gas chromatography with inductively coupled plasma mass spectrometry after enzymatic and acid digestion JF - JOURNAL OF CHROMATOGRAPHY A J2 - J CHROMATOGR A VL - 1218 PY - 2011 IS - 9 SP - 1260 EP - 1265 PG - 6 SN - 0021-9673 DO - 10.1016/j.chroma.2010.12.112 UR - https://m2.mtmt.hu/api/publication/21577663 ID - 21577663 LA - English DB - MTMT ER - TY - JOUR AU - Kurmaz, VA AU - Gul, tyai VP TI - Electrode reactions and electroanalysis of organomercury compounds JF - RUSSIAN CHEMICAL REVIEWS J2 - RUSS CHEM REV+ VL - 79 PY - 2010 IS - 4 SP - 307 EP - 350 PG - 44 SN - 0036-021X DO - 10.1070/RC2010v079n04ABEH004062 UR - https://m2.mtmt.hu/api/publication/21092533 ID - 21092533 LA - English DB - MTMT ER - TY - JOUR AU - Wu, P AU - He, LA AU - Zheng, CB AU - Hou, XD AU - Sturgeon, RE TI - Applications of chemical vapor generation in non-tetrahydroborate media to analytical atomic spectrometry JF - JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY J2 - J ANAL ATOM SPECTROM VL - 25 PY - 2010 IS - 8 SP - 1217 EP - 1246 PG - 30 SN - 0267-9477 DO - 10.1039/c003483e UR - https://m2.mtmt.hu/api/publication/22008740 ID - 22008740 N1 - Megjegyzés-21547631 : FN Thomson Reuters Web of Knowledge LA - English DB - MTMT ER - TY - JOUR AU - Chung, LW AU - Lin, KL AU - Yang, TCC AU - Lee, MR TI - Orthogonal array optimization of microwave-assisted derivatization for determination of trace amphetamine and methamphetamine using negative chemical ionization gas chromatography-mass spectrometry JF - JOURNAL OF CHROMATOGRAPHY A J2 - J CHROMATOGR A VL - 1216 PY - 2009 IS - 18 SP - 4083 EP - 4089 PG - 7 SN - 0021-9673 DO - 10.1016/j.chroma.2009.03.020 UR - https://m2.mtmt.hu/api/publication/21092535 ID - 21092535 LA - English DB - MTMT ER - TY - JOUR AU - Chung, LW AU - Liu, GJ AU - Li, ZG AU - Chang, YZ AU - Lee, MR TI - Solvent-enhanced microwave-assisted derivatization following solid-phase extraction combined with gas chromatography-mass spectrometry for determination of amphetamines in urine JF - JOURNAL OF CHROMATOGRAPHY B J2 - J CHROMATOGR B VL - 874 PY - 2008 IS - 1-2 SP - 115 EP - 118 PG - 4 SN - 1570-0232 DO - 10.1016/j.jchromb.2008.09.003 UR - https://m2.mtmt.hu/api/publication/21092536 ID - 21092536 LA - English DB - MTMT ER - TY - JOUR AU - Ito, R AU - Kawaguchi, M AU - Sakui, N AU - Honda, H AU - Okanouchi, N AU - Saito, K AU - Nakazawa, H TI - Mercury speciation and analysis in drinking water by stir bar sorptive extraction with in situ propyl derivatization and thermal desorption-gas chromatography-mass spectrometry JF - JOURNAL OF CHROMATOGRAPHY A J2 - J CHROMATOGR A VL - 1209 PY - 2008 IS - 1-2 SP - 267 EP - 270 PG - 4 SN - 0021-9673 DO - 10.1016/j.chroma.2008.09.037 UR - https://m2.mtmt.hu/api/publication/22008744 ID - 22008744 LA - English DB - MTMT ER - TY - JOUR AU - Zachariadis, GA AU - Kapsimali, DC TI - Effect of sample matrix on sensitivity of mercury and methylmercury quantitation in human urine, saliva, and serum using GC-MS JF - JOURNAL OF SEPARATION SCIENCE J2 - J SEP SCI VL - 31 PY - 2008 IS - 22 SP - 3884 EP - 3893 PG - 10 SN - 1615-9306 DO - 10.1002/jssc.200800345 UR - https://m2.mtmt.hu/api/publication/21092538 ID - 21092538 LA - English DB - MTMT ER - TY - JOUR AU - Abrankó, László AU - Kmellar, B AU - Fodor, Péter TI - Comparison of extraction procedures for methylmercury determination by a SPME-GC-AFS system JF - MICROCHEMICAL JOURNAL J2 - MICROCHEM J VL - 85 PY - 2007 IS - 1 SP - 122 EP - 126 PG - 5 SN - 0026-265X DO - 10.1016/j.microc.2006.04.001 UR - https://m2.mtmt.hu/api/publication/1390067 ID - 1390067 AB - In this study the comparison of three different alkaline extraction techniques carried out with methanolic NaOH followed by phenylation derivatization for the determination of methylmercury in marine fish was performed. The investigated three methods differed in the technique how the extraction assisting energy was introduced to the sample. Namely, closed vessel ultrasonic bath, an open vessel technique using an ultrasonic probe and the microwave assisted extraction procedures were characterized and optimized. Optimum values of 3 h at 75 degrees C for the ultrasonic bath, 25 min for the ultrasonic probe and 6 min at 60 W for the microwave method were obtained. All three methods were validated using the BCR-464 tuna fish certified reference material. (c) 2006 Elsevier B.V. All rights reserved. LA - English DB - MTMT ER - TY - JOUR AU - Evans, EH AU - Day, JA AU - Palmer, C AU - Price, WJ AU - Smithe, CMM AU - Tyson, JF TI - Atomic spectrometry update. Advances in atomic emission, absorption and fluorescence spectrometry, and related techniques JF - JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY J2 - J ANAL ATOM SPECTROM VL - 22 PY - 2007 IS - 6 SP - 663 EP - 696 PG - 34 SN - 0267-9477 DO - 10.1039/b705527g UR - https://m2.mtmt.hu/api/publication/22008986 ID - 22008986 LA - English DB - MTMT ER - TY - JOUR AU - Nóbrega, J A AU - Santos, M C AU - de Sousa, R A AU - Cadore, S AU - Barnes, R M AU - Tatro, M TI - Sample preparation in alkaline media JF - SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY J2 - SPECTROCHIM ACTA B VL - 61 PY - 2006 IS - 5 SP - 465 EP - 495 PG - 31 SN - 0584-8547 DO - 10.1016/j.sab.2006.02.006 UR - https://m2.mtmt.hu/api/publication/21577665 ID - 21577665 LA - English DB - MTMT ER -