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Spectrophotometric Method for Determination of Cationic Surfactants in Water with Bromocresol Green

Li Yan

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Abstract

In the NaH_2PO_4-Na_2HPO_4solution,in which the pH indicator is 6.17,can form ionic compound with the bromine cresol green and cationic surfactants: cetyltrim ethylammonium bromide ammonium(CTMAB)or cetylpyridinium bromide(CPB),the blue colors of solutions fade obviously.The cationic surfactants can be used for determining in the water body.The largest wavelength is 614nm.The Mole sucks coefficient of cetylpyridinium bromide respectively is 9.65×10~3 L·mol~(-1)·cm~(-1).The mole sucks coefficient of cetyltrim ethylammonium bromide is 7.81 ×10~3 L·mol~(-1)·cm~(-1).The density of cationic surfactantswith within the range of 0～2.4×10~(-5)mol/L(CTMAB) to 0～2.1×10~(-5)mol/L(CPB)accords with the Bill law.Examination limit: 6.12×10~(-7) mol/L(CTMAB),4.59×10~(-7) mol/L(CPB).The method can be used in the determine of cationic surfactants of the survey of living water,sewage farm import-exit water.The experiment has obtained the satisfactory result.

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What this paper is about

In the NaH_2PO_4-Na_2HPO_4solution,in which the pH indicator is 6.17,can form ionic compound with the bromine cresol green and cationic surfactants: cetyltrim ethylammonium bromide ammonium(CTMAB)or cetylpyridinium bromide(CPB),the blue colors of solutions fade obviously.The cationic surfactants can be used for determining in the water body.The largest wavelength is 614nm.The Mole sucks coefficient of cetylpyridinium bromide respectively is 9.65×10~3 L·mol~(-1)·cm~(-1).The mole sucks coefficient of cetyltrim ethylammonium bromide is 7.81 ×10~3 L·mol~(-1)·cm~(-1).The density of cationic surfactantswith within the range of 0～2.4×10~(-5)mol/L(CTMAB) to 0～2.1×10~(-5)mol/L(CPB)accords with the Bill law.Examination limit: 6.12×10~(-7) mol/L(CTMAB),4.59×10~(-7) mol/L(CPB).The method can be used in the determine of cationic surfactants of the survey of living water,sewage farm import-exit water.The experiment has obtained the satisfactory result.

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Available abstract

In the NaH_2PO_4-Na_2HPO_4solution,in which the pH indicator is 6.17,can form ionic compound with the bromine cresol green and cationic surfactants: cetyltrim ethylammonium bromide ammonium(CTMAB)or cetylpyridinium bromide(CPB),the blue colors of solutions fade obviously.The cationic surfactants can be used for determining in the water body.The largest wavelength is 614nm.The Mole sucks coefficient of cetylpyridinium bromide respectively is 9.65×10~3 L·mol~(-1)·cm~(-1).The mole sucks coefficient of cetyltrim ethylammonium bromide is 7.81 ×10~3 L·mol~(-1)·cm~(-1).The density of cationic surfactantswith within the range of 0～2.4×10~(-5)mol/L(CTMAB) to 0～2.1×10~(-5)mol/L(CPB)accords with the Bill law.Examination limit: 6.12×10~(-7) mol/L(CTMAB),4.59×10~(-7) mol/L(CPB).The method can be used in the determine of cationic surfactants of the survey of living water,sewage farm import-exit water.The experiment has obtained the satisfactory result.

Key concepts: Bromocresol green, Cationic polymerization, Chemistry, Bromide, Bromine, Ammonium bromide, Ionic liquid, Spectrophotometry

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Spectrophotometric Method for Determination of Cationic Surfactants in Water with Bromocresol Green — Research Paper | ScholarLens