论文部分内容阅读
科学技术的发展,对化学试剂纯度的要求越来越高,杂质元素的含量大多要求在10~(-5)—10~(-7)％,因此在检测手段上需要有灵敏、准确的方法。目前测定盐酸、硝酸中的铅是采用光谱分析,但若用极谱分析来测定,却也有独到之处,既快又准。利用铅的极谱吸附波在示波极谱仪上测导数,灵敏度可比经典极谱提高约两个数量级。现试用其测定高纯盐酸、硝酸中的杂质铅含量(10~(-6)—10~(-7)％),结果重现性好,回收亦达95％以上。
As the development of science and technology, the requirements on the purity of chemical reagents are getting higher and higher, the contents of impurity elements are mostly required to be between 10 and (-5) -10 to (-7)%. Therefore, a sensitive and accurate method is required for detection . The current determination of hydrochloric acid, nitric acid in the lead is the use of spectral analysis, but if the polarographic analysis to determine, but also unique, fast and accurate. The use of lead polarographic adsorption oscilloscope polarographic oscilloscope measurements, the sensitivity can be increased by about two orders of magnitude than the classical polarographic. Now try its determination of high purity hydrochloric acid, nitric acid impurities in the lead content (10 ~ (-6) -10 ~ (-7)%), the result is good reproducibility, the recovery also reached more than 95%.