电位法测定密闭环境空气中碱性气溶胶  

Determination of basic gasoloid in closed environment air by potentiometry

作　　者：陈培红 张洪彬[1] 韦桂欢[1] 杨品[1] 龙庆云[1] 商轶 Chen Peihong;Zhang Hongbin;Wei Guihuan;Yang Pin;Long Qingyun;Shang Yi(The 718th Research Institute of CSIC,Handan 056027,China)

机构地区：[1]中国船舶重工集团公司第七一八研究所,河北邯郸056027

出　　处：《化学分析计量》2021年第7期70-73,共4页Chemical Analysis And Meterage

摘　　要：建立电位法测定密闭环境中碱性气溶胶的检测方法。将空气中的碱性气溶胶采集到滤膜上,将滤膜剪碎,置于25 mL比色管中,加入20 mL水,将比色管置于振荡器中,于25℃恒温振荡器中剧烈振荡1 min,立即使用酸度计测定溶液的pH值,计算出空气中碱性气溶胶(以氢氧化钠计)的质量浓度。该方法的检出限为0.001 mg/m^(3),当碱性气溶胶的质量浓度在0.05~1.00 mg/m^(3)的范围内,加标回收率为84.4%~90.4%,测定结果的相对标准偏差小于5%(n=6)。该方法适用于密闭环境空气中碱性气溶胶的测定。The method for determination of basic gasoloid in closed environment air by potentiometry was established.The basic gasoloid in the air was collected onto the filter membrane,the filter membrane was cut and put into a 25 mL colorimetric tube,20 mL water was added,the colorimetric tube was put in an oscillator,and vibrate violently in constant temperature oscillator at 25℃for 1 min,used an acidimeter to determine the pH value of the solution immediately,and calculated the mass concentration of basic gasoloid(calculated by sodium hydroxide)in the air.The low detection limit of method was 0.001 mg/m^(3),the recoveries was 84.4%-90.4%with repeatability less than 5%(n=6)for the concentration of basic gasoloid in the concentration range of 0.05-1.00 mg/m^(3).The developed method has potential in the determination of basic gasoloid in closed environment.

关 键 词：密闭环境 碱性气溶胶 电位法 

分 类 号：O657.1[理学—分析化学]