Fluorometric determination of 1-naphthol and carbaryl with 3-amino-2(1H)-quinolinethione. IV.
作者:Tomohiko YOSHIDA、Hirokazu TANIGUCHI、Shuji OTUKA、Sabro NAKANO
DOI:10.1248/cpb.37.1823
日期:——
A fluorometric method for the determination of 1-naphthol (NP) with 3-amino-2(1H)-quinolinethione (AQT) was developed. The method is based on the oxidation of NP by Fremy's salt and the reaction with AQT in an acid medium, followed by extraction of a red fluorescent product (excitation maxima, 535 and 575 nm; emission maximum, 600 nm) with carbon tetrachloride after making the reaction mixture strongly basic. The calibration curve was linear in the range from 0.01 to 1.2 μg/ml of NP. This method was applied for the fluorometric determination of Carbaryl (NAC, 1-naphthyl N-methylcarbamate)(0.01-1.8 μg/ml), which was hydrolyzed with potassium hydroxide and determined by the same method as NP. The coefficient of variation was 13% (n=10) or 1.5% (n=10) for 0.3 μg/ml of NP or NAC, respectively.
本研究开发了一种用 3-氨基-2(1H)-喹啉硫酮(AQT)测定 1-萘酚(NP)的荧光测定法。该方法基于 NP 在酸性介质中被弗雷米盐氧化并与 AQT 反应,然后在使反应混合物呈强碱性后用四氯化碳萃取红色荧光产物(激发最大值为 535 和 575 nm;发射最大值为 600 nm)。校准曲线在 0.01 至 1.2 μg/ml NP 范围内呈线性关系。将该方法用于萘甲萘醌(NAC,1-萘基 N-甲基氨基甲酸酯)(0.01-1.8 μg/ml)的荧光测定,萘甲萘醌经氢氧化钾水解后,测定方法与 NP 相同。0.3 μg/ml NP 或 NAC 的变异系数分别为 13%(n=10)或 1.5%(n=10)。