摘要
将清洗干净并烘干的采样器的吸收膜上加入20%三乙醇胺-10%甘油-1%次亚磷酸钠混合吸收液100μL,按规定将采样器置于博物馆环境的空气中,对其中二氧化硫和二氧化氮作被动采样3~5d。采样结束时,将采样器的底膜及吸收膜取出,分别用水5.00 mL进行超声提取10min,用离子色谱法测定提取液中NO_2^-、NO_3^-、SO3_^(2-)和SO_4^(2-)等含量。以IonPac AS18色谱柱为分离柱,25mmol·L^(-1)氢氧化钾溶液为流动相,采用抑制型电导检测器测定。4种阴离子的检出限(3S/N)依次为0.007 8,0.008 9,0.009 0,0.008 0 mg·L^(-1),加标回收率为91.0%~103%,测定值的相对标准偏差(n=6)依次为2.5%,22%,21%,29%。
In the passive sampling of sulfur dioxide and nitrogen dioxide from environmental air of museum,a portion（100μL）of mixed absorption solution,composed of wS20% of TEA,wS10% of glyoerin and wS1% of sodium hypophosphite,was added to the absorption film of the cleaned and dried samplers,which were placed at definite sites for a sampling time of 3-5d.At the end of sampling,the base films and absorption films were taken out and each set of the films were extracted ultrasonically for 10 min with 5.00 mL of water,and 4anions of NO2^-,NO3^-,SO32-and SO_4^（2-）in the extracts were determined by ion chromatography.IonPac AS18 chromatographic column was used for chromatographic separation,25mmol·L^（-1） potassium hydroxide solution was used as mobile phase,and restraining conductance detector was used in the determination.The detection limits（3S/N）of the 4anions found were 0.007 8,0.008 9,0.009 0,0.008 0mg·L^（-1） respectively.Values of recovery found by standard addition method were in the range of 91.0%-103%.Values of RSD′s（n=6）found were 2.5%（for NO2-）,22%（for NO3-）,21%（for SO32-）,29%（for SO42-）.
出处
《理化检验（化学分册）》
CSCD
北大核心
2017年第8期923-927,共5页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
作者简介
方琳美（1991-），女，浙江龙泉人，硕士研究生，研究方向为离子色谱及液相色谱的开发与应用
通信联系人。hplc@ecust．edu．cn
