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GC和GC/MS分析常見錯誤觀念(转贴)
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GC??GC/MS????????e?`?^??(?).??????????????M???!????I?κΖ|????????B???????x????f?????????T??????????????????r?????????????f????????????f????????????V???@????????S????????????????V???@????????o???c??????g??Y????????????????]????Bonded and Cross Link???????????V???@???????????????M???????????????v????r?????????????????????]???}??????M???r????????^??????????_????????????????????o??????bleeding????}??!??DB??е????????????????????PLOT??е??????????N?^??????????????Bonded and Cross Link????PLOT??й??????o????molecular seieve??Aluminum Oxide??Polystyrene?????????|?????????????z?y?????r?ǚ?B??????????????v???????????????????.............???????????@???f?????http://www.sepu.net/dvbbs/dispbb ... ID=51525&page=1?????@????????????l?????????У????????????@???????}???ú???????????????????????? GC??GC/MS????????e?`?^??(??)?z???????????S??????0.995, ???????????????_???z???????????傀???????????t, ????w?????????????S??????????0.995????,????????l????????z????, ??????????????, ?@?????????, ?????λ?W?????l????????????????????????????????????????????????????п??????????50ppm???, ?H?{???????]?k???_?J! ?μ??????????e????(Y?S)?????(X?S)???u????z????У???????????????}, ??????R??????????????, ???????????0.995??r??????????, ???????????, R??H??_????????????, ???????Q????????????_?????, ????????????????_?J??! ?Щ?z?????`????????c??????????????????????, ??????????z?????????10??20??30??40??50mg/L???傀???, ????e?????GC??GC/MS????????y=mx+c???????????r?, ???????Or=0.999????, 0.999???????????,???????????, ?????e??10??20??30??40??50mg/L???傀?????GC?????r???????????????e??e?????????????????, ?@?????????????????c??????????^, ???????`???????^??, ???????10??15%??????. ?@????z??????????????. ???@?????ó?????????е?????????????a?????`???r?? ?????c?_?J?????????????u????z???????g?c???, ?????GC??????????, ?`???????????15%.?????????????????????????}????! ?????f???????????????????????}??, ????????????????N???o????????????y?`??. ???????????????????N???????????_?J, ??????f??????z????????Supelco??, ??????????Merck???????????, ???u??z?????????g?c??????GC?з???, ??????????`??????15%????(GC/MS????, ????????`??????20%????). ??Щ??????????y?I??????N???, ?????????????I?c?z??????????????????, ???????????????! [ Last edited by ???? on 2009-4-22 at 21:21 ] |
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我再贴,因为是好东西嘛!
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1. ??????????????condition( ???)???? ??????! ???^??????????????r?g??condition! ??????????t?????????m????????????condition,?@?????????????????,???????????????????????????????????,???Λr????????. ?????,?????????b???ж????и??V???@?????????Condition????,??????,????o???_????????, ??Q????????c?????????t! 2. ????^?????????N??Condition? ??????M??????????????,?^??????L?r?g??????濾??????,????????????{????????????????30??,?????????!! Condition??????==>???==>????==>????==>???==>????.....????????,???????????????program???O?????ε????????. ???N?????????? ??N????:????????????????????????????30??. ????N??????????r?????program???????. ???????????????N???O?????. 3. ?????Condition?????N????????????run???? ?@?????x???ж??????????,??????????????????????! ???????????????,???ppm???????,??????????????????Condition! ????????????????r?g?^????,??????^????,?????????^??????c?????????c??r?g??! ?????????????,???????????????MDL????????, ????????°??r,????O????B????????(?????????÷???program ), ??run???????????C???. 4. ???????????ЙC????????? ???WCOT??cross link????????]???}! ??DB??HP?????????f???о????f????ЩDB??HP??е??????????????ЙC??????. 5. ???N?|????^????????????M???????? ?o?C????|????????M,??????????????????o??????!! 6. ???? ????????????????? ??????????????M???????? ?????????Щ????????,????????M???????,??????????c, ???GC?????T????^????,????GC??????GC?x?????????, ?????????]???N????! ?????N?o?????,???????????????????M???????,???????????ЙC???????????????. ?????????J&W???(DB???????u???S??)???Y?????@?(????????W·???d??,???????λ???),?????N?o?????|???????????  B-wax, DB-1??DB-225,???N??r????,???????????,????N??????3mL??????,???????????1mL????,???????,???????_???,??????????|???????N??????????e???(???????????????K?????),????@?????е???? "before Inj.????????, "After Inj.?????????????,"After rinse?????????????)DB-1 Parameter Before Inj. After Inj. After Rinse Ret. Factor 14.6 14.5 14.5 Ret. Index 1 1349.88 1350.02 1350.05 Ret. Index 2 1427.77 1428.16 1428.07 Theor. plates 1448 1474 1391 Bleed(pA) 12.8 11.2 21.5 DB-wax Parameter Before Inj. After Inj. After Rinse Ret. Factor 12.6 12.6 11.7 Ret. Index 1 1149.54 1149.73 1150.82 Ret. Index 2 1163.44 1163.71 1164.13 Theor. plates 1277 1261 1268 Bleed(pA) 50.5 97.8 97.6 Bleed2 42.2 41.0 39.6 DB-225 Parameter Before Inj. After Inj. After Rinse Ret. Factor 11.5 11.4 11.2 Ret. Index 1 1622.30 1621.26 1620.97 Ret. Index 2 1711.51 1711.03 1710.77 Theor. plates 1101 1110 1160 Bleed(pA) 15.0 114.0 53.9 ????Y???: a. ?????????????:polarity, selectivity, retention time, efficiency, activity???K?o??????. b.????????Bleeding????:100%??DMPS?o??,??PEG??50%??cyanopropyl phase?????^?m?^?????. c.Non polar?????????????????????????K?o??, ???polar ?????(bonded,??cross-link)????, ??????????o??. ???????]????????????. ????????о??????A??,????????FID,???????????????????????.... ????????f??????????FID??????,?????????z??????????????????????????_.....????ECD?t???????B??, ?ǖ|????????????!! 7. ?????????????r, base line?????,???condition??????? ??????????????,???????ǜ?????,??????????,????????a??bleeding, ????r??????,????????????????^???????r,?@?N??r??e????! ?費?????????????y?O??,????????bleeding?????????????r, ?@?r???????N????Condition??]????! ????????r?Q???^С???????...... |
2楼2007-08-07 11:37:28
3楼2007-08-07 14:16:29
4楼2007-08-07 20:19:30