【摘要】 目的:建立痕量铜的新的测定方法。方法:利用新三氮烯试剂,采用表面活性剂溴化十六烷基三甲胺通过湿法消解对食用面粉的痕量铜进行分光光度测定。结果与结论:该方法测定痕量铜或人发的摩尔吸光系数为 1．47×105L·mol-1·cm-1,最大吸收波长为 530 nm,铜量在0~12．0 μg/25 ml范围内符合比尔定律。更多还原

【Abstract】 Aim: To determine the trace copper in the flour. Methods: Through the way of chearing up of wet method, spectrophotometric determination of trace copper in the flour or hair with new triazene in the presence of CTMAB was per-formend. Results and conclusion: Its apparent molar absorptivity is 1. 47× 105L · mol-1· cm-1 ; the absorption maximum of the aqueous soluble complex is at 530 nm; Beer’s law is obeyed from 0 to 12. 0μg/25 ml Cu.更多还原