聚丙烯
解吸
色谱法
吸附剂
检出限
分析化学(期刊)
化学
分析物
采样(信号处理)
材料科学
吸附
复合材料
有机化学
计算机视觉
计算机科学
滤波器(信号处理)
作者
Jingfu Liu,Yong Tao,Jia Sun,Guibin Jiang
出处
期刊:Analytical Methods
[The Royal Society of Chemistry]
日期:2011-01-01
卷期号:3 (3): 696-696
被引量:1
摘要
A new passive sampling device was developed for field equilibrium sampling of geosmin (GSM) and 2-methylisoborneol (MIB) in surface water. The sampling device was prepared by coating a 50 cm length polypropylene hollow fiber tubing (50 μm wall thickness, 280 μm inner diameter) with polypropylene glycol 4000. The sampler was brought into equilibrium with the sample in the field, and then transferred and immersed into 100 μL of methanol held in a little desorption device for room temperature desorption and preservation of the sampled analytes. After being transported to the laboratory, the analytes were determined by headspace solid-phase microextraction-GC-MS. The large surface area-to-volume ratio of the developed sampler facilitated the reaching of sampling equilibrium in 1 h, while the equilibrium sampling minimized the effects of environmentally relevant sampling conditions. Variation of sample pH (4.0–9.0) and salinity (0–100 mM NaCl) had no significant effects on the distribution coefficients of analytes to the sampler. The desorption device, constructed with a 200 μL glass insert, and a 2 mL brown glass vial with PTFE sealed screw cap, has no loss of analytes during the storage of the sampler. The proposed procedure had detection limits of 4 and 9 ng L−1 for GSM and MIB, respectively. This developed sampler was successfully applied to field sampling in Taihu Lake (China), with MIB and GSM detected in the range of 0.11–0.61 μg L−1 during a medium out-break of blue–green algae bloom.
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