摘要
合成了５－（２－（４－氯苯酚）偶氮）－罗丹宁。在ｐＨ６．９５的ＮＨ４Ａｃ缓冲溶液中，当有０．１８％的ＳＬＳ存在时，Ａｇ（Ⅰ）与ＣＰＡＲＨ形成１：１络合物，λｍａｘ为４８０ｎｍ，ε为１．０×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，Ａｇ（Ⅰ）含量在０．０１１～５．４０μｇ／ｍＬ范围内服从Ｂｅｅｒ定律。所提出的方法用于精铜矿中微量银的测定，相对误差在５．０％以内。
CPARH [5- (2- (4-chlorophenol ) az ) -rhodanine] synthesized in this laboratory has been proposed as an analytical reagent. In a pH 6. 95 NH4Ac buffer solution containing 0. 18% SLS, silver(Ⅰ) forms an orange complex with CPARH, the molar absorptivity being 1. 0 ×105 L·mol-1·cm-1 at 480um. Over the range of silver (Ⅰ) concentration from 0. 011 to 5. 40 μg/mL Beer's law is obeyed. The proprosed method can beused to determine trace silver in ore samples.
出处
《化学试剂》
CAS
CSCD
北大核心
1996年第3期165-167,共3页
Chemical Reagents
