著者
中田 麻衣子 村田 芳行 多田 幹郎 下石 靖昭
出版者
公益社団法人 日本分析化学会
雑誌
分析化学 (ISSN:05251931)
巻号頁・発行日
vol.52, no.10, pp.899-902, 2003 (Released:2004-01-30)
参考文献数
8

A simple spectrophotometric method for the determination of polyoxyethylene nonionic surfactants, such as TritonX-100 with 1-(p-phenylphenacyl)-4-(4-aminonaphthylazo)-pyridinium bromide(PPAP), was developed. PPAP was synthesized by quarternizing 4-(4-aminonaphthylazo)-pyridine with p-phenylphenacyl bromide. Because PPAP was easily associated with nonionic surfactants to produce a blue ion associate in aqueous solution, the concentration of nonionic surfactants were determined by measuring the absorbance of ion associates at 612 nm. The apparent molar absorptivity of the TritonX-100 ion associate was 1.0×103 dm3 mol−1 cm−1 at 612 nm. The calibration graph for TritonX-100 was linear over the range from 6.0×10−5 to 8.0×10−4 M, and the relative standard deviation for 5.6×10−4 M of TritonX-100 was 2.0%. The proposed method was applied to the determination of nonionic surfactants in commercial domestic detergents.