Spectrophotometric determination of azithromycinbase by charge transfer reaction

用分光光度法分别研究了阿奇霉素与7,7,8,8-四氰基对二次甲基苯醌(TCNQ)和氯冉酸(CL)之间的荷移反应。实验表明:阿奇霉素与TCNQ间的反应在丙酮介质中进行,形成的络合物在743和842nm有两个吸收峰,表观摩尔吸光系数分别是2·7×104L·mol-1·cm-1和5·0×104L·mol-1·cm-1;阿奇霉素与氯冉酸的反应在丙酮介质中进行,形成的络合物在530nm处有吸收峰,表观摩尔吸光系数2·4×103L·mol-1·cm-1。用摩尔比法和等摩尔连续变化法测得荷移络合物中阿奇霉素与配体的摩尔比均为1∶2。用以上两种方法测定了阿奇霉素片剂中阿奇霉素的含量,相对标准偏差为1·0%~1...The charge transfer interactions of Azithromycin and 7,7,8,8-tetracyanoquinodimethane (TCNQ) or chloranilic acid (CL) were investigated by spectrophotometry. The apparent molar absorptivity of TCNQ complex is 2.7 X 10(4) L center dot mol(-1) center dot cm(-1) at 743 nm, and 5.0 X 10(4) L center dot mol(-1) center dot cm(-1) at 842 nm; and that of CL complex is 2.4 X 10(3) L center dot mol(-1) center dot cm(-1). Beers law is obeyed in the concentration range of 0-30 mg center dot L-1 for TCNQ method, and 5-225 mg center dot L-1 for CL method. The relative standard deviations of the two methods are 1.0% and 1.4% (n=6), respectively. The composition of complex of Azithromycin with 7,7,8,8-tetracyanoquinodimethane or chloranilic acid is 1 : 2. This proposed method has been applied to the determination of Azithromycin in tablets with satisfactory results.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000238045800032&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701SCI(E)中文核心期刊要目总览(PKU)中国科技核心期刊(ISTIC)中国科学引文数据库(CSCD)805913-9162