电感耦合等离子体质谱法测定黑小麦中多种元素

建立黑小麦中B、Na、Mg、Al、K、Ca、Ti、V、Cr、Mn、Fe、Co、Ni、Cu、Zn、Se、Cd、Pb元素的分析方法。以硝酸和双氧水为混合试剂采用密闭微波消解法对黑小麦样品进行消解后用电感耦合等离子体质谱法进行分析。利用动态反应池技术有效地消除了分析过程中的质谱干扰，选用Sc、Ge、Rh、Bi为内标元素校正基体效应和信号漂移。元素Mg、Al、K、Ca在0～10.00 mg/L线性范围内线性关系良好，其余元素在0～50.00 μg/L内线性关系良好，该方法测定黑小麦中18 种元素的检出限在3.04～17.38 ng/L之间，相对标准偏差为0.95%～12.50%，采用国家一级标准物质小麦（GBW 10011）验证方法的准确度和精密度。黑小麦中B、Mg、K、Ca、Fe、Mn、Se含量远高于普通小麦，而Na元素明显低于普通小麦。方法可用于黑小麦的质量控制和营养评价。

Determination of Multi-Elements in Triticale by Inductively Coupled Plasma Mass Spectrometry

A method for simultaneous and quantitative determination of 18 elements including B, Na, Mg, Al, K, Ca, Ti, V,
Cr, Mn, Fe, Co, Ni, Cu, Zn, Se, Cd and Pb in triticale was established. Samples were digested by using a mixture of HNO3
and H2O2 in a closed-vessel microwave system, and the 18 elements in the test solution were then detected by inductively
coupled plasma mass spectrometry (ICP-MS). The mass spectral interferences caused by polyatomic ions were corrected
by dynamic reaction cell (DRC). Sc, Ge, Rh and Bi were used as internal standard elements to correct the matrix effect
and signal drift. The linear ranges of Mg, Al, K and Ca were 0–10.00 mg/L, whereas those of the other elements were
0–50.00 μg/L. The limits of detection (LODs) of the 18 elements were in the range of 3.04–17.38 ng/L with relative standard
deviations (RSDs) between 0.95% and 12.50%. The accuracy and precision of this method were confirmed by reference
standard material (GBW 10011, wheat). The contents of B, Mg, K, Ca, Fe, Mn and Se in triticale were obviously higher than
those in normal wheat, while the content of Na in triticale was lower than that in normal wheat. The technique presented in
this study is useful for the quality control and nutritional evaluation of triticale.