摘要
新合成了试剂7-(8'-羟基喹啉偶氮)-8-羟基喹啉\5-磷酸(简称8QA8Q5S),并对其进行结构鉴定,研究了试剂荧光光度法测定镁的反应条件。镁与试剂在pH10.30氨水/氯化铁缓冲介质中形成2:1的络合物并呈现荧光,其λex/λem=260/488(um),线性范围为0~12μg/25mL,检测限为3.12PPb,考察了共存离子的干扰,并直接应用于合金样中镁的测定,结果满意。
A new fluorimetric method of determination for magnesium(Ⅱ) is described. The method is based on the fluorescent complex of 8QA8Q5S with Mg(Ⅱ) at λex/λem = 2C0/488 (nm). The composition of complex is Mg:R = 2: 1 at PH 10. 30, a good linear relation ship was obtained over the range of 0~12μg/25mL Mg(Ⅱ) and the limit of detection for Mg(Ⅱ) is 3.1 ppb. The method has been directly used to determine trace Mg(Ⅱ) in samples with satisfactory results.
出处
《化学试剂》
CAS
CSCD
北大核心
1995年第2期77-78,70,共3页
Chemical Reagents
基金
江西省自然科学基金
关键词
偶氮
羟基喹啉
磺酸
荧光光度法
镁
合金
hydroxy quinolineazo) -8-Lydroxy quinoline-5-sulfonic acid , fluorimetry, magnesium(Ⅱ)