论文部分内容阅读
铝的分光光度定量测定法较多,其中以铬天青S(CAS)法较好,目前应用最普遍。但CAS法受温度及放置时间的影响较大,因而重现性不太理想。作为对CAS的改进,资料介绍了十六烷基三甲基氯化铵(CTMAC)存在时,铝和CAS的三元络合光度测定法,其灵敏度及重现性均优于CAS法,我们试验用十六烷基三甲基溴化铵(CTMAB)来代替CTMAC,获得较为满意的结果,其效果与CTMAC的相似。CAS-CTMAC或CAS-CTMAB法的缺点是共存元素的干扰影响较CAS法略大,不过常见元素铁和铜可用掩蔽剂掩蔽。
Aluminum spectrophotometric determination of more, of which Chromium Azure S (CAS) method is better, the most common application. However, the CAS method is greatly affected by the temperature and the placement time, so the reproducibility is not so good. As an improvement on CAS, the information on the ternary complexometric determination of aluminum and CAS in the presence of cetyltrimethylammonium chloride (CTMAC) is superior to CAS in sensitivity and reproducibility The experiment with cetyltrimethylammonium bromide (CTMAB) instead of CTMAC, to obtain more satisfactory results, the effect of CTMAC similar. The downside of the CAS-CTMAC or CAS-CTMAB method is that interference by coexisting elements is slightly larger than that by the CAS method, but the common elements, iron and copper, can be masked with masking agents.