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| 论文编号: |
14 |
| 论文题目: |
Influences of relative humidities and temperatures on the collection of C-2-C-5 aliphatic hydrocarbons with multi-bed (Tenax TA, Carbograph 1TD, Carboxen 1003) sorbent tube method |
| 英文论文题目: |
Influences of relative humidities and temperatures on the collection of C-2-C-5 aliphatic hydrocarbons with multi-bed (Tenax TA, Carbograph 1TD, Carboxen 1003) sorbent tube method |
| 第一作者: |
Ho, SSH |
| 英文第一作者: |
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| 联系作者: |
Huang Yu |
| 英文联系作者: |
Huang Yu |
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| 发表年度: |
2017 |
| 卷: |
151 |
| 期: |
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| 页码: |
45-51 |
| 摘要: |
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| 英文摘要: |
Volatile organic compounds (VOCs) are measured with sorbent tubes followed by thermal desorption (TD) analysis. Water vapor in the atmosphere affects sampling breakthrough and results in low collection efficiency. This paper reports the effect of relative humidity (RH) and temperature on the collection of 57 ozone precursors with a multi-bed tube composed of three different strengths of adsorbents (Tenax TA, Carbograph 1 TD, and Carboxen 1003). Unacceptable breakthrough values for volatile C-2-C-5 aliphatic compounds were observed under high (>60%) RHs. The breakthrough volumes (BV) for C-2 aliphatic compounds were reduced 13-22 fold under 90% RH. Dry-purge with inert helium gas removes excessive water content before the TD analysis but also causes a maximum of 40% loss of target analytes. Condensation is another pathway for water retention. The tube temperature should be regulated at 5 - 10 degrees C above the air temperature to minimize condensation under RHs >30%. |
| 刊物名称: |
ATMOSPHERIC ENVIRONMENT |
| 英文刊物名称: |
ATMOSPHERIC ENVIRONMENT |
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| 全文链接: |
http://www.sciencedirect.com/science/article/pii/S1352231016309669 |
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