微波消解ICP-OES法同时测定鱼胶中八种金属元素

王书舟; 汤鋆; 姚秀娟; 胡永红

doi:10.13421/j.cnki.hjwsxzz.2016.06.009

微波消解ICP-OES法同时测定鱼胶中八种金属元素

Determination of Eight Metals in Ichthyocolla by Microwave Digestion and ICP-OES Analysis

摘要

摘要:
目的建立微波消解-电感耦合等离子体光谱法（ICP-OES）测定鱼胶中8种金属元素的方法。
方法将风干鱼胶样品粉碎混匀，微波消解后，用电感耦合等离子体光谱仪对钙、镁、钾、钠、铁、锰、铜、锌8种元素同时测定。
结果钙、镁、钾、钠元素标准曲线浓度范围为0 mg/L~40.0 mg/L，相关系数r在0.9994~0.9999之间，检测限分别为0.49 mg/kg、0.48 mg/kg、5.00 mg/kg和2.67 mg/kg；铁、锰、铜、锌元素标准曲线浓度范围为0 mg/L~2.0 mg/L，相关系数r在0.9998~0.9999之间，检测限分别为0.58 mg/kg、0.63 mg/kg、0.46 mg/kg和0.43 mg/kg；各元素样品加标回收率在92%~105%间，RSD在1.5%~6.6%间。
结论该方法能满足鱼胶样品多种金属元素的同时测定，样品消解彻底，操作简单快速，谱线干扰少，灵敏度准确度高，线性范围宽。

Abstract:
Objective To establish a method for the determination of eight metals in ichthyocolla simultaneously by microwave digestion and inductively coupled plasma spectroscopy (ICP-OES).
Methods Dried ichthyocolla samples were crushed and mixed.After microwave digestion, the concentrations of calcium, magnesium, potassium, sodium, iron, manganese, copper and zinc were determined by ICP-OES.
Results The standard curve for Ca, Mg, K and Na were linear in the range of 0 mg/L~40.0 mg/L, r=0.9994~0.9999, and the detective limits 0.49 mg/kg, 0.48 mg/kg, 5.00 mg/kg and 2.67 mg/kg, respectively.Similarly, the standard curve for Fe, Mn, Cu and Zn were linear in the range of 0~2.0 mg/L, r=0.9998~0.9999, and the detection limits were 0.58 mg/kg, 0.63 mg/kg, 0.46 mg/kg and 0.43 mg/kg, respectively.The recovery of standard addition of all samples were 92%~105%, RSD were 1.5%~6.6%.
Conclusions Eight metals in ichthyocolla could be determined simultaneously by this method.There were many other advantages in this method, such as thorough digestion of samples, simple and rapid operation, less interference in spectral range, high sensitivity, high accuracy and wide linear range and so on.

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