title: Determination of As, Hg and Pb in herbs using slurry sampling flow injection chemical vapor generation inductively coupled plasma mass spectrometry.
abstract: Analysis of herbs for As, Hg and Pb has been carried out using slurry sampling inductively coupled plasma mass spectrometry (ICP-MS) with flow injection vapor generation. Slurry containing 0.5% m/v herbal powder, 0.1% m/v citric acid and 2% v/v HCl was injected into the VG-ICP-MS system for the determination of As, Hg and Pb that obviate dissolution and mineralization. Standard addition and isotope dilution methods were used for quantifications in selected herbal powders. This method has been validated by the determination of As, Hg and Pb in NIST standard reference materials SRM 1547 Peach Leaves and SRM 1573a Tomato Leaves. The As, Hg and Pb analysis results of the reference materials agreed with the certified values. The precision obtained by the reported procedure was better than 7% for all determinations. The detection limit estimated from standard addition curve was 0.008, 0.003, and 0.007 ng mL(-1) for As, Hg and Pb, respectively.
authors: Department of Chemistry, National Sun Yat-sen University, Kaohsiung 80424, Taiwan.
authors: Chia-Yi
authors: CY
authors: Tai
authors: Department of Chemistry, National Sun Yat-sen University, Kaohsiung 80424, Taiwan; Department of Medical Laboratory Science and Biotechnology, Kaohsiung Medical University, Kaohsiung 80708, Taiwan. Electronic address: sjjiang@faculty.nsysu.edu.tw.
authors: Shiuh-Jen
authors: SJ
authors: Jiang
authors: National Centre for Compositional Characterisation of Materials (CCCM), Hyderabad, India.
authors: A C
authors: AC
authors: Sahayam
mesh_terms: D027883:Astragalus Plant / Q000737:chemistry*; D017022:Flow Injection Analysis / Q000379:methods*; D005506:Food Contamination / Q000032:analysis*; D007854:Lead / Q000032:analysis*; D057230:Limit of Detection; D008628:Mercury / Q000032:analysis*; D018515:Plant Leaves / Q000737:chemistry*; D011208:Powders; D013054:Spectrophotometry, Atomic / Q000379:methods*
chemical_list: D011208:Powders; D007854:Lead; D008628:Mercury
keywords: As, Hg and Pb; Flow injection; Herbs; Inductively coupled plasma mass spectrometry; Slurry sampling; Vapor generation