样品预处理对糖果中铬含量测定的影响

Effect on determination of Chromium content in candy by different preparation

研究不同的样品处理方法对胶基糖果和凝胶糖果中重金属铬含量的影响。分别采用干法灰化、湿式消解和压力消解罐消解3种不同方法对样品进行预处理,然后用原子吸收光谱法对样品中铬含量进行测定。方法的线性良好,在线性范围0～0.500mg/L内,相关系数达0.9998;测试样品的准确度和精密度也符合要求;相比较而言,干法灰化处理的样品准确度偏低。用微波消解进行糖果产品的预处理,操作简便快捷,结果准确可靠,是适合检验检测行业的一种新型、快速的处理手段。

To study the content of Chromium in gum based confections and gelatinized confections by different sample preparation. The samples were pretreated respectively by dry ashing, wet digestion and microwave digestion, and determined by atomic absorption spectrometry. The method had good linearity and the linear range was from 0 to 0.500 mg/L and the correlation coefficient was up to 0.9998. The accuracy and precision can meet the requirements. But the accuracy using dry ashing was lower. The results indicated that it is easy, fast, and accurate by microwave digestion, and is suitable for inspection.