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2002•Journal of Zhejiang Normal UniversityRequires access

Study on the color reaction of 1-(2,6-dibromo-4-nitrophenyl)-3-(4- nitrophenyl)-triazene with cationic surfactant

Shen Su

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Abstract

This paper dealt with the color reaction of 1(2,6dibromo4nitrophenyl)3(4nitrophenyl)triazene (DBNPNPT) with cethyltrimethylammonium bromide (CTMAB) and cetylpyridinium bromide (CPB).In NaOH medium, DBNPNPT reacts with quarternary ammonium cationic surfactant(CTMAB,CPB) to form purplered complex with the molar ratio of 1∶2.The molar absorptivities of CTMAB and CPB are 3.67×10\+4 and 4.11×10\+4 L·mol\+\{-1\}·cm\+\{-1\} by using dualwavelength spectrophotometry,Beer′s law is obeyed in the range of 0～13.85 mg/L for CTMAB, 0～16.09 mg/L for CPB.The method has been applied to the direct determination of cationic surfactant in water with satisfactory results.

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What this paper is about

This paper dealt with the color reaction of 1(2,6dibromo4nitrophenyl)3(4nitrophenyl)triazene (DBNPNPT) with cethyltrimethylammonium bromide (CTMAB) and cetylpyridinium bromide (CPB).In NaOH medium, DBNPNPT reacts with quarternary ammonium cationic surfactant(CTMAB,CPB) to form purplered complex with the molar ratio of 1∶2.The molar absorptivities of CTMAB and CPB are 3.67×10\+4 and 4.11×10\+4 L·mol\+\{-1\}·cm\+\{-1\} by using dualwavelength spectrophotometry,Beer′s law is obeyed in the range of 0～13.85 mg/L for CTMAB, 0～16.09 mg/L for CPB.The method has been applied to the direct determination of cationic surfactant in water with satisfactory results.

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Available abstract

This paper dealt with the color reaction of 1(2,6dibromo4nitrophenyl)3(4nitrophenyl)triazene (DBNPNPT) with cethyltrimethylammonium bromide (CTMAB) and cetylpyridinium bromide (CPB).In NaOH medium, DBNPNPT reacts with quarternary ammonium cationic surfactant(CTMAB,CPB) to form purplered complex with the molar ratio of 1∶2.The molar absorptivities of CTMAB and CPB are 3.67×10\+4 and 4.11×10\+4 L·mol\+\{-1\}·cm\+\{-1\} by using dualwavelength spectrophotometry,Beer′s law is obeyed in the range of 0～13.85 mg/L for CTMAB, 0～16.09 mg/L for CPB.The method has been applied to the direct determination of cationic surfactant in water with satisfactory results.

Key concepts: Cationic polymerization, Chemistry, Pulmonary surfactant, Color reaction, Ammonium bromide, Spectrophotometry, Bromide, Triazene

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