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| 气袋采样-苏玛罐转移-GC/MS法测定废气中醛类恶臭物质 |
| Bag Sampling SUMMA Canister Transferring GC/MS Determination of Malodorous Aldehyde Compounds in Waste Gas |
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| DOI： |
| 中文关键词: 醛类恶臭物质 气袋采样 苏玛罐 气相色谱-质谱联用法 废气 |
| 英文关键词: Malodorous aldehyde substance Sampling bag SUMMA canister GC MS Waste gas |
| 基金项目:上海市环境保护局地标《恶臭（异味）污染物排放标准》（DB 31/1025—2016）〖JP3〗制定基金资助项目（沪环科［2016］-54号） |
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| 中文摘要: |
| 采用气袋采样-苏玛罐转移-GC/MS法测定废气中5种醛类恶臭物质，醛类同分异构体能够被完全分离、定性定量。保存时间验证试验表明，5种低浓度醛类在Tedler采样袋和PVDFs采样袋中能稳定存放12 h，高浓度醛类能较稳定地保存24 h，转移至苏玛罐中的样品能够稳定存放至少14 d。方法在4×10-10～2×10-8范围内线性良好，方法检出限为0.127 μg/m3~0.207 μg/m3，混合标气6次测定结果的RSD为3.4%～8.8%，加标回收率为103%～114%。 |
| 英文摘要: |
| The concentrations of propionaldehyde, n butanal, isobutyraledhyde, n valeraldehyde and isovaleraldehyde in waste gas were determined by gas chromatography mass spectrometry with bag sampling and SUMMA canister transferring. The isomers of these 5 aldehydes were entirely separated, qualitatively and quantitatively analyzed. The compounds with low concentration could be stable in Tedler or PVDFs sampling bags for 12 hours, while with high concentration, 24 hours, according to storage time verification test. The samples were stable for at least 14 days when transferred into SUMMA canisters. The method had good linearity in the ranger of 4×10-10～2×10-8.The detection limits were 0.127 μg/m3~0.207 μg/m3, the RSDs and recoveries of 6 repeated measurements for mixed standard substances were 3.4%～8.8% and 103%～114%, respectively. |
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