中文摘要：

针对水中的藻源性嗅味化合物，建立了顶空固相微萃取-气相色谱／质谱的分析方法，并对样品保存及前处理等条件进行了优化。研究结果显示，相应浓度范围内标准曲线线性良好，土臭素（Geosmin）、2-甲基异莰醇（2-MIB）和β-环柠檬醛（β—cyclocitral）的检出限分别为1．3、1．9、2．1ng／L，测定下限分别为5．2、7．6、8．4ng／L；过长的样品保存时间、原水中的微生物以及自来水中的余氯都会对测定结果产生干扰；为保证测定结果的可靠性，原水样品取样后应添加氯化汞以抑制微生物的影响，自来水样品应采用硫代硫酸钠脱氯处理，0—4℃下保存，并应在一周内完成样品的分析。

英文摘要：

An analytical method based on headspace solid-phase microextraction coupled with gas chromatography/mass spectrometry （GC/MS） was developed for the determination of the algal odor com- pounds in water. Several conditions, such as sample storage and pretreatment were optimized. The results show good standard curve linearity over the relative concentration range. The detection limits of geosmin, 2-methylisoborneol （2-MIB） and β-cyclocitral are 1.3 ng/L, 1.9 ng/L and 2. 1 ng/L, the reliable quantitation limits are 5.2 ng/L, 7.6 ng/L and 8.4 ng/L, respectively. The long storage time of samples, microorganisms in raw water and the residual chlorine in tap water can interfere the determination results. To ensure the reliability of the determination results, mercuric chloride should be added in raw water after sampling to inhibit the influence of microorganisms, and sodium thiosulfate should be added in tap water for dechlorination. The samples should be stored at 0 to 4 ℃ and analyzed in one week.