【摘要】：2-甲基異莰醇(2-methylisoborneol,2-MIB)和土臭素(geosmin,GSM)在水源水中大量分泌排放是造成飲用水土霉異味突發(fā)事件、引發(fā)居民用水恐慌的重用因素之一。使用頂空固相微萃取(HS-SPME)與氣相色譜-質(zhì)譜聯(lián)用技術(shù)(GC-MS)建立了水庫(kù)水、水庫(kù)附近土壤、居民自來水中2-MIB和GSM的測(cè)定方法。結(jié)合正交分析優(yōu)化了加鹽量、萃取溫度、萃取時(shí)間條件,在電子轟擊(EI)-選擇離子掃描(SIM)模式下進(jìn)行了目標(biāo)物的定性定量分析。結(jié)果表明:在5~1 000 ng/L范圍內(nèi),2-MIB和GSM的色譜峰面積與其質(zhì)量濃度的線性關(guān)系良好(r2≥0.998),2-MIB與GSM的檢出限分別為0.72 ng/L和0.34 ng/L,定量限分別為2.40 ng/L和1.13 ng/L;目標(biāo)物加標(biāo)水平為10~600 ng/L時(shí),平均回收率為93.6%~107.7%,相對(duì)標(biāo)準(zhǔn)偏差(RSD)≤6.1%(n=6)�；谏鲜龇椒�,對(duì)遼寧省某地區(qū)水庫(kù)水、水庫(kù)附近土壤、居民自來水中的目標(biāo)物進(jìn)行檢測(cè),結(jié)果表明:水庫(kù)水目標(biāo)物質(zhì)量濃度范圍為3.0~3.6ng/L,水庫(kù)附近土壤中提取的2-MIB為8.1 ng/L、提取的GSM為17.8 ng/L,居民自來水中的目標(biāo)物未檢出。該方法操作簡(jiǎn)便、準(zhǔn)確可靠,靈敏度高,無需有機(jī)溶劑,適合于飲用水中2-MIB和GSM的分析檢測(cè)。
[Abstract]:The release of 2-methylisoborneoline (2-MIB) and soil odor (geosmin,GSM) in the source water is one of the reuse factors that cause the sudden occurrence of earthy odour in drinking water and cause the residents to panic with water. Headspace solid phase microextraction (HS-SPME) and gas chromatography-mass spectrometry (GC-MS) were used to determine 2-MIB and GSM in reservoir water, soil near reservoir and tap water of residents. Combined with orthogonal analysis, the conditions of salt addition, extraction temperature and extraction time were optimized. The qualitative and quantitative analysis of the target material was carried out under the mode of electron bombardment (EI)-selective ion scanning (SIM). The results showed that the linear relationship between the peak area of 2-MIB and GSM and their mass concentration was good in the range of 5 000 ng/L (r 2 鈮，

本文編號(hào)：2315598