期刊
ANALYST
卷 126, 期 2, 页码 136-140出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b009825f
关键词
-
资金
- NIEHS NIH HHS [ES04908] Funding Source: Medline
- NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES [P42ES004908] Funding Source: NIH RePORTER
The extraction of arsenic from freeze-dried apples and subsequent determination of individual arsenic species by HPLC-ICP-MS is described. Solvent extraction with sonication using various aqueous and aqueous/solvent mixtures was initially evaluated by measuring total arsenic extracted by ICP-MS. A two step procedure using overnight treatment with alpha -amylase enzyme followed by sonication for 6 h with 40 : 60 acetonitrile-water was found to provide good extraction efficiency. The concentration of arsenic extracted was compared with the concentration of total arsenic in the samples determined using ICP-MS after microwave digestion in order to calculate extraction efficiency. Individual arsenic species in the extracts were measured using HPLC-ICP-MS. The three most abundant arsenic species found were arsenite, arsenate and dimethylarsinic acid. Total arsenic concentrations in the freeze-dried apple samples ranged from 8.2 to 80.9 mug kg(-1) As, dry mass. By HPLC-ICP-MS, the relative amount of inorganic arsenic in the samples ranged from 73 to 90% of the sum of the arsenic species detected in each sample.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据