質(zhì)譜法分析化學(xué)ppt課件-文庫吧資料
2025-05-10 12:55本頁面
【正文】 of GCMS 結(jié)束 12:41:47 第五章 質(zhì)譜分析 一、飽和烴 alkanes 二、芳烴的 aromatic hydrocarbons 三、醇和酚 alcohols and phenols 四、 醚 ethers 五、 醛、酮 aldehydes and ketones 六、 其他化合物 other pounds 第四節(jié) 質(zhì)譜圖與結(jié)構(gòu)解析 （電子轟擊質(zhì)譜 — EIMS ） mass spectrometry， MS mass spectrograph and structure determination 12:41:47 1 61 5m / zm e t h a n eM = 1 6一、飽和烴的質(zhì)譜圖 alkanes m / z1 52 94 35 78 59 9 1 1 3 1 4 27 112:41:47 1 008 09 01 0 06 05 03 02 04 07 00 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 1 6 0 1 8 0 2 0 0% OF BASE PEAK1 0 3 0 5 0 7 0 9 0 1 1 0 1 3 0 1 5 0 1 7 0 1 9 0 2 1 0 2 2 0 2 3 0C 2C 3 C 4 C 5C 6C 7m / z = 2 9m / z = 4 3 m / z = 5 7m / z = 7 1m / z = 8 59 91 1 3 1 2 7 1 4 1 1 5 5 1 6 9 1 8 31 9 7C 8 C9 C 1 0C 1 1 C 1 2 C 1 3 C 1 4C 1 6C H 3 ( C H 2 ) 1 4 C H 3Mm / z = 2 2 6n H e x a d e c a n eM W 2 2 6m / z1 52 94 35 78 59 9 1 1 3 1 4 27 1正癸烷 ?分子離子： C1(100%)， C10(6%)， C16(小 )， C45(0) ?有 m/z ： 29， 43， 57， 71， ……C nH2n+1 系列峰 (σ— 斷裂 ) ?有 m/z ： 27， 41， 55， 69， ……C nH2n1 系列峰 C2H5+（ m/z =29） → C 2H3+（ m/z =27） +H2 ?有 m/z ： 28， 42， 56， 70， ……C nH2n系列峰 (四圓環(huán)重排 ) 12:41:47 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 1 6 0 1 8 0 2 0 01 0 3 0 5 0 7 0 9 0 1 1 0 1 3 0 1 5 0 1 7 0 1 9 0 2 1 0 2 2 0 2 3 01 008 09 01 0 06 05 03 02 04 07 00% OF BASE PEAKC3m / z = 4 3C4m / z = 5 7C5m / z = 7 1C8m / z = 8 5C 6m / z = 9 9C71 1 3C9C1 0C1 2 C 1 6M 1 5M5 M e t h y l p e n t a d e c a n eC H3( C H2)3C H ( C H2)9C H3C H38 5 1 6 9 1 4 15 712:41:47 M = 8 4C y c l o h e x a n e8 4 ( M )5 6 ( C4H8+)4 1 ( C3H5+)1 008 09 01 0 06 05 03 02 04 07 0% OF BASE PEAK0 2 0 4 0 6 0 8 0 1 0 01 0 3 0 5 0 7 0 9 0 1 1 0012:41:47 M = 9 89 8 ( M )1 008 09 01 0 06 05 03 02 04 07 0% OF BASE PEAK0 2 0 4 0 6 0 8 0 1 0 01 0 3 0 5 0 7 0 9 0 1 1 08 36 95 54 12 9M e t h y l C y c l o h e x a n eC H 3m / z = 9 8 m / z = 8 312:41:47 8 4 ( M )0 2 0 4 0 6 0 8 0 1 0 01 0 3 0 5 0 7 0 9 0 1 1 06 95 54 12 71 008 09 01 0 06 05 03 02 04 07 0% OF BASE PEAKC H CH3CC H3C H2C H3C H CH3CC H3C H CH3CC H3C H2C H3C H2C H3m / z = 6 9m / z = 5 512:41:47 1 3 4 ( M )1 008 09 01 0 06 05 03 02 04 07 0% OF BASE PEAK0 2 0 4 0 6 0 8 0 1 0 01 0 3 0 5 0 7 0 9 0 1 1 09 17 79 25 13 91 2 0 1 3 0 1 4 06 5C H2C H2C H2C H3二、芳烴的質(zhì)譜圖 aromatic hydrocarbons 12:41:47 C H2C H2C H2C H3C H2m / z = 9 1m / z = 9 1m / z = 6 5m / z = 3 9m / z = 1 3 4H C C HH C C HC H2C H2C H3H2CC H2C HHC H3C H2HHm / z = 9 2C H2H CC H3C H2C H2C H2C H3m / z = 7 7m / z = 1 3 4m / z = 5 1H C C HC4H912:41:47 R 2 CR 1R 3O H R 3R 2CR 1O Hm / z : 3 1 , 5 9 , 7 3 ,R H CHC H 2O HR H CC H 2O HH H 2 OR H C C H2R H C C H2( C H 2 ) n ( C H2 ) n( C H 2 ) n ( C H 2 ) no r三、醇和酚的質(zhì)譜圖 alcohols and phenols 12:41:47 R H CHC H2C H2C H2O +HH2C C H2 H2OM ( A l k e n e + H2O ) M 4 6H2C C H RR H CHH CC H2C H2O +HC H3H2CHC H2O C H3H2C C H R M 6 0HC C H 2H 2 CC H HH 2CRH 2 C C H 2C H 2C HH 2CRM 7 612:41:47 C H2O HHO Hm / z = 1 0 8m / z = 1 0 7 C OHH H2HHHHHm / z = 7 9 m / z = 7 712:41:47 1 008 09 01 0 06 05 03 02 04 07 00 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0% OF BASE PEAK1 0 3 0 5 0 7 0 9 0 1 1 0 1 3 0 1 5 0C H3C H25 7M C H3C H2M C H3ME t h y l s e c b u t y l e t h e rM W 1 0 27 3 2 98 75 7H3C CHO HC H3C H2HCC H3O C H2C H34 52 97 38 71 0 2四、 醚的質(zhì)譜圖 ethers 12:41:47 0 2 0 4 0 6 0 8 0 1 0 01 2 0 1 4 0 1 6 0 1 8 0 2 0 05 0 7 0 9 0 1 1 0 1 3 0 1 5 0 1 7 0 1 9 02 1 0 2 2 0 2 3 01 008 09 0
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號(hào)-1