摘要
在硫酸介质中，甲醛能催化溴酸钾氧化藏红T的反应，使其荧光猝灭，据此建立了催化动力学荧光分析法测定甲醛的新方法。研究了催化反应的性能，优化了方法的实验条件。方法的线性范围为0．025～O．25μg／mL，检出限4．19×10～μg／mL。该方法简便快速，常见共存物质干扰小，已用于环境水样及家居空气中痕量甲醛的测定，结果满意。
A catalytic spectrofluorimetric method was proposed for the determination of trace formaldehyde. It was based on the catalytic effect of formaldehyde on the oxidation of Safranine T by potassium bromate in sulphuric acid medium. The linear range of the determination was 0. 025-0.25μg/mL and the detection limit was 4.19× 10^-5μg/mL. The method is quick and simple . There was little interference with common organic substances. The method was applied to the determination of trace formaldehyde in water samples of environment and air of house with satisfactory results.
出处
《分析科学学报》
CAS
CSCD
2006年第5期582-584,共3页
Journal of Analytical Science
关键词
催化动力学荧光法
甲醛
藏红T
Catalytic kinetic spectrofluorimetry
Formaldehyde
Safranine T
