摘要
在硝酸-硝酸钠存在下,六次甲基四胺缓冲溶液(pH=6.3左右)中,二甲酚橙与阳离子表面活性剂溴化十六烷基三甲基铵(CTMAB)形成离子缔合物,最大吸收波长590nm,摩尔吸光系数为6 9×104L·mol-1·cm-1,CTMAB的质量浓度在0～400μg/mL范围内符合比耳定律,线性回归方程A=0 003323+0 0047C(C单位为μg/mL),相关系数为0 9975。用于生活废水中微量CTMAB测定,回收率为98 60%～98 98%。
A spectrophotometric method was developed for the determination of cationic surfactants based on the formation of ion-associated compounds of xylenol orange with cetyltrimethylammonium bromide(CTMAB) cationic surfactants in aqueous solution in the presence of hexamethylenetetramine buffer solution(pH=6.3).The maximum absorption exhibits at 590 nm and the molar absorptivity is 6.9×10~4 L·mol^(-1)·cm^(-1).Beer′s law was obeyed for CTMAB in the range of 0～400 μg/mL.The linear regression equation is A=0.003323+0.0047C (C in μg/mL).The detection limit is 0.027 mg/L.For the determination of CTMAB in aqueous solution,the recovery is 98.60%～98.98% and RSD=0.43%.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2004年第z1期53-54,共2页
Fine Chemicals
