乳浊液进样-石墨炉原子吸收法快速测定牛奶中的铬

目的:快速准确测定牛奶中的铬含量。方法:前处理采用稀释液超声处理牛奶样品,并用石墨炉原子吸收法测定铬,对稀释液的配比浓度,超声时间等条件进行优化。结果:在优化后的条件下,对牛奶样品进行处理分析,测定的相关系数r=0.9997,方法检出限为0.18 ug/L,加标回收率在96.1%~102.9%。结论:本方法操作简单、快捷,具有良好的准确性和可靠性。

Emulsion injection - Graphite furnace atomic absorption spectrometry Determination of Chromium in Milk

Objective： Rapid and caaurate determination of chromium content in milk. Methods： Pre-treated the milk with dilunet and ultrasonic,determined the calcium in milk by Graphite furnace atomic absorption spectrometry, discussed the ration of concentration of the diluent and ultrasonic time conditions. Results： Under the optimized conditions, the correlation coegicient r = 0.9997,the limit of detection was 0.18 μg/L. The recoveries rate was 96.1% -102.9%. This method was, stable and applicable. Conclusion：The method was simple and fast,with good accuracy and reliability.