A novel method for the determination of cationic surfactant by laser thermal lens spectrometry was developed. It was based on the reaction between 1-hydroxy-2-(5-nitro-2-Pyri- dylazo)-8-aminonaphthalene-3,6-disulfoni...A novel method for the determination of cationic surfactant by laser thermal lens spectrometry was developed. It was based on the reaction between 1-hydroxy-2-(5-nitro-2-Pyri- dylazo)-8-aminonaphthalene-3,6-disulfonic acid (5-NO2-PAH) and cationic surfactant to form 1:2 ionic association complex in a weakly basic medium (pH 9.44). The determination conditions and the mechanism were discussed. The method has been applied to the analysis of wastewater and moat water samples.展开更多
A selective and sensitive method for determination of platinum and palladium(II) in an aqueous solution simultaneously by laser thermal lens spectrometry, based on the complex reaction of 2-(3,5-dichloropyridylazo)-5-...A selective and sensitive method for determination of platinum and palladium(II) in an aqueous solution simultaneously by laser thermal lens spectrometry, based on the complex reaction of 2-(3,5-dichloropyridylazo)-5-dimethylaminoamiline (3,5-diCl-PA^D~MA) with platinum and palladium, has been developed. It is shown that the palladium complex can be formed at room temperature, while the platinum complex can be only formed after being heated in a boiling water bath. By using this difference of reaction temperature and the characteristic of the complexes mentioned above, the method for simultaneous determination of platinum and palladium was established in an aqueous solution without a pre-separation. The results show that the dynamic linear ranges of determination for platinum and palladium are 0.005- 0.04 μg/mL and 0.005- 0.25 μg/mL respectively, and that the detection limits are both 0.002 μg/mL. The method has been applied to the determination of platinum and palladium simultaneously in alloy and catalyst samples with satisfactory results.展开更多
文摘A novel method for the determination of cationic surfactant by laser thermal lens spectrometry was developed. It was based on the reaction between 1-hydroxy-2-(5-nitro-2-Pyri- dylazo)-8-aminonaphthalene-3,6-disulfonic acid (5-NO2-PAH) and cationic surfactant to form 1:2 ionic association complex in a weakly basic medium (pH 9.44). The determination conditions and the mechanism were discussed. The method has been applied to the analysis of wastewater and moat water samples.
基金ProjectsupportedbytheNaturalScienceFoundationofShaanxiProvinceofChina (No .97H0 1) .
文摘A selective and sensitive method for determination of platinum and palladium(II) in an aqueous solution simultaneously by laser thermal lens spectrometry, based on the complex reaction of 2-(3,5-dichloropyridylazo)-5-dimethylaminoamiline (3,5-diCl-PA^D~MA) with platinum and palladium, has been developed. It is shown that the palladium complex can be formed at room temperature, while the platinum complex can be only formed after being heated in a boiling water bath. By using this difference of reaction temperature and the characteristic of the complexes mentioned above, the method for simultaneous determination of platinum and palladium was established in an aqueous solution without a pre-separation. The results show that the dynamic linear ranges of determination for platinum and palladium are 0.005- 0.04 μg/mL and 0.005- 0.25 μg/mL respectively, and that the detection limits are both 0.002 μg/mL. The method has been applied to the determination of platinum and palladium simultaneously in alloy and catalyst samples with satisfactory results.
