详细信息
微波灰化-液相色谱-电感耦合等离子体质谱联用测定干食用菌中的三价铬和六价铬 被引量:16
Determination of trivalent chromium and hexavalent chromium in dried edible fungi by microwave ashing-liquid chromatography with inductively coupled plasma mass spectrometry
文献类型:期刊文献
中文题名:微波灰化-液相色谱-电感耦合等离子体质谱联用测定干食用菌中的三价铬和六价铬
英文题名:Determination of trivalent chromium and hexavalent chromium in dried edible fungi by microwave ashing-liquid chromatography with inductively coupled plasma mass spectrometry
作者:倪张林[1] 汤富彬[1] 屈明华[1] 莫润宏[1]
第一作者:倪张林
机构:[1]中国林业科学研究院亚热带林业研究所国家林业局经济林产品质量检验检测中心(杭州)
年份:2014
卷号:32
期号:2
起止页码:174-178
中文期刊名:色谱
外文期刊名:Chinese Journal of Chromatography
收录:CSTPCD;;Scopus(收录号:2-s2.0-84897782422);WOS:【ESCI(收录号:WOS:000434531800011)】;北大核心:【北大核心2011】;CSCD:【CSCD2013_2014】;PubMed;
基金:国家林业公益性行业科研专项课题(201304705;201204414)
语种:中文
中文关键词:微波灰化;液相色谱-电感耦合等离子体质谱;三价铬;六价铬;干食用菌
外文关键词:microwave ashing; liquid chromatography with inductively coupled plasma massspectrometry (LC-ICP-MS) ; trivalent chromium: hexavalent chromium; dried edible fungi
分类号:O658
摘要:建立了干食用菌中三价铬(Cr(Ⅲ))和六价铬(Cr(Ⅵ))的液相色谱-电感耦合等离子体质谱(LC-ICP-MS)检测方法.采用微波灰化技术对食用菌样品进行灰化处理,灰化样品用乙二胺四乙酸(EDTA)二钠盐稳定其中的Cr(Ⅲ),并使其保留在阴离子交换柱(250 mm×4.6 mm,10 μm)上;用含有60 mmol/L硝酸(pH 9.3)的流动相分离其中的Cr(Ⅲ)和Cr(Ⅵ),电感耦合等离子体质谱仪测定.标准溶液中Cr(Ⅲ)和Cr(Ⅵ)的质量浓度在0.5~50μg/L范围内呈良好的线性关系,线性回归系数均达到0.999 9.食用菌样品中Cr(Ⅲ)和Cr(Ⅵ)不同加入量的平均回收率为78.0%~ 90.7%,相对标准偏差小于4%(n=6);定量限均为0.5μg/L.该方法稳定、可靠、灵敏,可满足干食用菌中Cr(Ⅲ)和Cr(Ⅵ)的测定.
An analytical method using liquid chromatography with inductively coupled plasma mass spectrometry (LC-ICP-MS) for the determination of trivalent chromium ( Cr ( Ⅲ ) ) and hexavalent chromium ( Cr( Ⅵ) ) in dried edible fungi was established. Edible fungi sample was ashed by a microwave ashing system and Na2EDTA was added to the ashing sample to stabilize the Cr( Ⅲ). An anion exchange column (250 mm×4. 6 mm, 10 μm) with a 60 mmol/L nitric acid (pH 9.3) solution as mobile phase was used for the separation and using ICP-MS as a detector for the determination of trivalent chromium and hexavalent chromium. The calibration curves were linear in the range of 0.5-50 μg/L and the correlation coefficients were 0. 999 9 for Cr(Ⅲ) and Cr(Ⅵ). The average recoveries of Cr(Ⅲ) and Cr(Ⅵ) ranged from 78.0% to 90.7% with the relative standard deviations ( RSDs, n = 6) less than 4%. The limits of quantifi- cation (LOQ) of Cr( Ⅲ) and Cr(Ⅵ ) were 0.5 μg/L. The method is efficient, reliable and sen- sitive, and can meet the requirement for the determination of Cr( Ⅲ ) and Cr(Ⅵ ) in dried edi- ble fungi.
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