期刊论文

Determination of Total Arsenic in Pleurotus ostreatus and Agaricus brunnescens Fruit Bodies Using Microwave Digestion Combined with Atomic Fluorescence Spectrometry

中文

食用菌学报

1005-9873

2008

15

2

75-78

10.16488/j.cnki.1005-9873.2008.02.016

中央级公益性科研院所基本科研业务费专项基金“我国食用菌重金属富集机理及检测技术研究”（编号:2007-7）的部分研究内容；

本校为第一机构

采用微波消解—原子荧光光谱法,优化了微波消解—原子荧光光谱法测定食用菌中总砷的各种条件：前处理选用3.00 mL HNO3＋1.50 mL30%H2O2作消解剂,采用方案3（步骤1维持时间5 min,步骤2维持时间12 min,其它参数参考MARS5微波消解植物样品推荐方案）消解样品,在400 mL/min载气流量,15 g/L硼氢化钾溶液还原条件下测定了平菇和小棕蘑菇中砷的含量,测定结果准确可靠,此方法的检出限为0.1μg/L,标准偏差4.26%,试验回收率在86.4%～108.6%之间。该方法适用于原子荧光光谱法测定食用菌中的总砷。

Total arsenic levels in fruit bodies of the edible mushrooms, Pleurotus ostreatus and Agaricus brunnescens, were determined using microwave digestion combined with atomic fluorescence spectrometry. Optimisation of the procedure with respect to digest reagent concentrations, digestion conditions, carrier gas flow rates and KBH4 reductant concentration resulted in an arsenic detection limit of 0. 1μg/L and recovery rates of 86.4%～108.6% （RSD 4.26%）. The procedure represents a simple, rapid and accurate method for measuring total...