title: [Determination of trace mercury in rice by microwave digestion-hydride generation-atomic fluorescence spectrometry].
abstract: It was reported in this paper that trace mercury in rice was determined by microwave digestion-hydride generation-atomic fluorescence spectrometry. The microwave digestion of samples was used, and the optimum conditions for the digestion were developed. The relative factors of hydride generation atomic fluorescence spectrometry for the determination were tested and discussed. The temperature and the relative humidity were discussed too. The detection limit was 0.005 ng x mL(-1). Mercury in reference materials (rice flour, GBW 08508) was determined also by the described method. The result obtained was in good agreement with standard value. The relative standard deviation (RSD) was 2.1%, and the recovery of mercury in rice samples was 95.2%-106.4%.
authors.affiliation: Rice Product Quality Inspection and Supervision Testing Center, Ministry of Agriculture, China National Rice Research Institute, Hangzhou 310006, China.
authors.forename: Ren-xiang
authors.initials: RX
authors.lastname: Mou
authors.forename: Ming-xue
authors.initials: MX
authors.lastname: Chen
authors.forename: Zhi-wei
authors.initials: ZW
authors.lastname: Zhu
authors.forename: Neng
authors.initials: N
authors.lastname: Chen
mesh_terms: D005453:Fluorescence; D005506:Food Contamination / Q000032:analysis; D057230:Limit of Detection; D008628:Mercury / Q000032:analysis*; D008872:Microwaves; D012275:Oryza / Q000737:chemistry*; D011786:Quality Control; D012015:Reference Standards; D013050:Spectrometry, Fluorescence / Q000379:methods*
chemical_list: D008628:Mercury