title: [Study on determination of trace nitrite and reaction mechanism by two-wavelength negative absorption-catalytic spectrophotometry].
abstract: A new method was proposed for the determination of trace nitrite by two wavelength negative absorption catalytic spectrophotometry based on the catalysis of nitrite on the oxidation fading reaction of acridine orange by potassium bromate in phosphoricacid medium. The additive value of negative absorbances at two wavelengths was linear to the nitrite concentration in the range of 1.0 x 10(-5)-5.0 x 10(-7) mol x L(1). The method has been used to the determination of nitrite in environment water sample with satisfactory
authors.affiliation: Department of Chemistry, Huaibei Coal Teachers College, Huaibei 235000, China.
authors.forename: Yan-qin
authors.initials: YQ
authors.lastname: Zi
authors.forename: Hao-miao
authors.initials: HM
authors.lastname: Lu