期刊论文

中文

应用化工

1671-3206

2009

38

1

135-138,151

10.16581/j.cnki.issn1671-3206.2009.01.045

湖南省自然科学基金（03JJY3030）；

本校为第一机构

在稀硫酸介质中,溴酸钾与吡啰红Y能聚集成较大粒径的纳米微粒而使共振光散射增强,而甲醛能催化溴酸钾氧化吡啰红Y而导致体系共振光散射减弱,据此建立了一种灵敏、简单、快速测定血浆中痕量甲醛的新方法.结果表明,在适宜的反应条件下,在574.6 nm波长处的RLS强度与甲醛的浓度在一定范围内呈良好线性关系;该方法甲醛的线性范围在1.141×10~(-2)～2.279 μg/mL,相关系数为r=0.999 7,检出限为3.804 ng/mL.已成功用于血浆中痕量甲醛的测定,血样分析甲醛的相对标准偏差为4.9%～7.9%,平均回收率为101.6%(n=6).

A novel catalytic resonance light scattering method for the determination of traces of formaldehyde in blood plasma was developed. It was based on the fact that potassium brornate reacted with pyronine Y to form association nanoparticles which gave stronger resonance light scattering （RLS） effect, and formaldehyde can catalyze potassium bromate oxidizing pyronine Y resulting in decreasing of the intensity of resonance light scattering in sulfuric acid. In the optimum experimental conditions, it was found that the intensity of resonance light ...