二乙醇胺-盐酸副玫瑰苯胺法测定作业场所空气中二氧化硫研究  

Determination of sulfur dioxide in the air of work places by using hydrochloride-pararosaniline spectrophotometry method with diethanol amine

作　　者：范建中[1] 金梦燕[2] 吴素珍[3] 

机构地区：[1]宁波市疾病预防控制中心宁波市毒物研究与控制重点实验室,浙江宁波315010 [2]浙江医学高等专科学校,杭州310000 [3]浙江宁波天一职业技术学院,浙江宁波315010

出　　处：《中国卫生检验杂志》2012年第10期2322-2324,共3页Chinese Journal of Health Laboratory Technology

摘　　要：目的:建立低毒、准确、灵敏的二乙醇胺-盐酸副玫瑰苯胺测定作业场所空气中二氧化硫的方法。方法:采用体积比为0.05%的二乙醇胺为吸收液,通过在酸性条件下与氨基磺酸及盐酸副玫瑰苯胺进行显色反应,在548 nm处采用分光光度法测定。结果:二氧化硫浓度在0.1μg/ml～2.00μg/ml范围内呈良好的线性关系(r2=0.9996),回收率在94.0%～106.0%范围,相对标准偏差小于2.0%,检出限为0.1 mg/m3。结论:采用二乙醇胺为吸收剂,建立的方法具有低毒、环保的优点,可满足作业场所空气中二氧化硫的测定,而且克服了国标方法的四氯汞钾吸收液剧毒的不足。Objective： To develop a harnffulless, sensitive and accurate method for the determination of sulfur di- oxide in the air in work places using hydrochloride - pararosaniline spectrophotometry with diethanol amine. Meth- ods： In this method, diethanol amine （0.05%） was used as absorption solution, which reacted with hydrochloridc - pararosanillne under the acid condition of aininosulfonie acid, and the sulfur dioxide in the air in work places was determined by spectrophotometry at the wavelength of 548 nm. Results： Linearity in the range of 0. 10 μg/ml 2.00 μg/ml provided a determination coefficient （ r2） of 0. 9996 for sultur dioxide. Recoveries were in the range of 94.0% - 106.0% , precision values expressed as relative standard deviations （RSDs） was less than 2.0% （n = 6 ） , and the limit of quantification （LOQ） was 0.1 mg/m3. Conclusion： In this work, the lower toxic, diethanol amine was used as an absorption solution instead of higher toxic tetrachloro mercury potassium, and the developed hydro- chloride - pararosaniline spectrophotometry method possess some advantages of lower toxicity and environmental pro- tection, and it can be applied to the routine analyses of sulfur dioxide in the air in work places.

关 键 词：二氧化硫 二乙醇胺 作业场所 空气 盐酸副玫瑰苯胺 

分 类 号：O657.31[理学—分析化学]