caa a22 4500 465748198 CHVBK 20180323111826.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00322783 doi (NATIONALLICENCE)springer-10.1007/BF00322783 Spectrophotometric determination of anionic surfactants in tap and river waters with 1-(10-bromodecyl)-4-(4-aminonaphthylazo)-pyrimidinium bromide [Elektronische Daten] [Yasuaki Shimoishi, Haruo Miyata] Summary: A new cationic dye, 1-(10-bromodecyl)-4-(4-aminonaphthylazo)-pyridinium bromide, was synthesized and evaluated as a new reagent for the determination of anionic surfactants. The reagent reacts with anionic surfactants, such as sodium dodecylsulphate and sodium dodecylbenzenesulphonate, to produce an ion associate in an aqueous medium. The colour change occurs simultaneously, and the colour development is very stable. This makes it possible to determine anionic surfactants directly by spectrophotometry without solvent extraction. The stoichiometric ratio of the ion associate was found to be 1:1 by the mole ratio method. The calibration graph was linear up to 2.5×10−6 mol/l. The apparent molar absorptivity of the ion associate was 5.3×104 l mol−1 cm−1 (at 595 nm). The relative standard deviation (n=10) for 1.2×10−6 mol/l sodium dodecylsulphate was 4.9%. The proposed method was applied to the determination of anionic surfactants in tap and river waters. Springer-Verlag, 1990 Shimoishi Yasuaki School of Health Sciences, Okayama University, 2-5-1, Shikata-cho, Okayama-shi, 700, Okayama, Japan aut Miyata Haruo Shujitsu Joshi University, 1-6-1, Nishigawara, Okayama-shi, 703, Okayama, Japan aut Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/1(1990-01-01), 46-49 0937-0633 338:1<46 1990 338 216 https://doi.org/10.1007/BF00322783 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00322783 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shimoishi Yasuaki School of Health Sciences, Okayama University, 2-5-1, Shikata-cho, Okayama-shi, 700, Okayama, Japan aut NATIONALLICENCE 700 1- Miyata Haruo Shujitsu Joshi University, 1-6-1, Nishigawara, Okayama-shi, 703, Okayama, Japan aut NATIONALLICENCE 773 0- Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/1(1990-01-01), 46-49 0937-0633 338:1<46 1990 338 216 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer