Machado Raquel C, Amaral Clarice D B, Nóbrega Joaquim A, Araujo Nogueira Ana Rita
Group for Applied Instrumental Analysis, Department of Chemistry, Federal University of São Carlos , São Carlos, SP 13565-905, Brazil.
Embrapa Pecuária Sudeste , São Carlos, SP 13560-970, Brazil.
J Agric Food Chem. 2017 Jun 14;65(23):4839-4842. doi: 10.1021/acs.jafc.7b01448. Epub 2017 Jun 6.
A microwave-induced plasma optical emission spectrometer with N-based plasma was combined with a multimode sample introduction system (MSIS) for hydride generation (HG) and multielemental determination of As, Bi, Ge, Sb, and Sn in samples of forage, bovine liver, powdered milk, agricultural gypsum, rice, and mineral fertilizer, using a single condition of prereduction and reduction. The accuracy of the developed analytical method was evaluated using certified reference materials of water and mineral fertilizer, and recoveries ranged from 95 to 106%. Addition and recovery experiments were carried out, and the recoveries varied from 85 to 117% for all samples evaluated. The limits of detection for As, Bi, Ge, Sb, and Sn were 0.46, 0.09, 0.19, 0.46, and 5.2 μg/L, respectively, for liquid samples, and 0.18, 0.04, 0.08, 0.19, and 2.1 mg/kg, respectively, for solid samples. The method proposed offers a simple, fast, multielemental, and robust alternative for successful determination of all five analytes in agricultural samples with low operational cost without compromising analytical performance.
一种带有氮基等离子体的微波诱导等离子体光发射光谱仪与多模式进样系统（MSIS）相结合，用于氢化物发生（HG）以及在单一预还原和还原条件下对饲料、牛肝、奶粉、农用石膏、大米和矿物肥料样品中的砷、铋、锗、锑和锡进行多元素测定。使用水和矿物肥料的有证标准物质评估了所开发分析方法的准确性，回收率在95%至106%之间。进行了加标回收实验，所有评估样品的回收率在85%至117%之间。对于液体样品，砷、铋、锗、锑和锡的检出限分别为0.46、0.09、0.19、0.46和5.2 μg/L，对于固体样品，分别为0.18、0.04、0.08、0.19和2.1 mg/kg。所提出的方法提供了一种简单、快速、多元素且稳健的替代方法，能够在不影响分析性能的情况下，以较低的运行成本成功测定农业样品中的所有五种分析物。
