haohanHH-BEN-2室内空气中苯系物测定在线填充柱

据统计人平均每天80%以上的时间在室内活动,室内空气中苯系物对我们人体的危害是比较大的,苯系物已被世界卫生组织列为强致癌物,尤其是苯,毒性很强.在GB/T 18883—2002《室内空气质量标准》中对苯系物有具体测定方法,

浩瀚色谱（山东）应用技术开发有限公司建立便携式色谱仪快速测定室内空气中低浓度苯系物的方法。方法在Tedlar气袋中制备目标化合物单标样品,采用便携式色谱仪内置恒流泵采样,预浓缩器预浓缩后热解析进样,苯系物专用柱分离,微氩离子检测器检测,确定保留时间,保留时间定性;采用液体外标法制备不同浓度的目标化合物混合标准,峰面积定量。结果在本研究所选择的色谱条件下,对苯系物具有良好的分离效果,分析周期为15min;检测浓度范围分别为苯0.018~0.879mg/m3、甲苯0.035~1.299mg/m3、乙苯0.035~1.300mg/m3、间(对)二甲苯0.035~1.320mg/m3、邻二甲苯0.035~1.296mg/m3。对苯、甲苯、乙苯、间二甲苯、邻二甲苯的*低检出浓度分别为7.5、11.5、28.8、30.3和30.6μg/m3;实验室内测定和现场测定结果与标准方法比较相对偏差分别小于13.9%和20.0%。在不同浓度下同一天和一周内进行的方法精密度实验相对标准偏差小于8.4%。结论该方法灵敏度高、重现性好,抗干扰能力强,具有较高的准确度,可以满足室内空气中低浓度苯系物快速测定的要求。

名称：苯系物专用柱
规格：2m*1/8
型号：HH-BEN-2
应用：苯系物在线测定
   
According to statistics, people spend more than 80% of their time indoors on average. The benzene series in the indoor air is relatively harmful to our human body. Benzene series has been listed as a strong carcinogen by the World Health Organization, especially benzene, which is very toxic. Strong. There are specific determination methods for benzene series in GB/T 18883-2002 "Indoor Air Quality Standard".

Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. has established a portable chromatograph for the rapid determination of low-concentration benzene series in indoor air. Methods A single standard sample of the target compound was prepared in a Tedlar air bag, sampled by a portable chromatograph built-in constant-flow pump, pre-concentrated by a pre-concentrator, and then injected with thermal desorption, separated by a special column for benzene series, and detected by a micro-argon ion detector to determine the retention. Time, retention time qualitative; using liquid external standard method to prepare mixed standards of different concentrations of target compounds, peak area quantification. Results Under the chromatographic conditions selected in this study, the benzene series had a good separation effect, and the analysis period was 15min; ~1.300mg/m3, m(para)xylene 0.035~1.320mg/m3, o-xylene 0.035~1.296mg/m3. The minimum detectable concentrations of p-benzene, toluene, ethylbenzene, m-xylene, and o-xylene were 7.5, 11.5, 28.8, 30.3 and 30.6 μg/m3, respectively; the relative deviations of the results of the laboratory and field determinations compared with the standard method were respectively Less than 13.9% and 20.0%. The relative standard deviation of the method precision experiments performed on the same day and within a week at different concentrations was less than 8.4%. Conclusion The method has high sensitivity, good reproducibility, strong anti-interference ability and high accuracy, which can meet the requirements of rapid determination of low-concentration benzene series in indoor air.

Name: Special column for benzene series
Specifications: 2m*1/8
Model: HH-BEN-2
Application: On-line determination of benzene series