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guolianshun

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UV spectra were taken on a Specord UV VIS spectrophotometer. GLC was carried out on a
LKhM-8MD (model 5) chromatograph with column length 2 m, stationary phase was 15% carbowax-
20 M on chromaton N-AW-GMDS 0.16-0.20 nm, carrier gas was helium, 30 ml/min. At a column
temperature of 130~ the retention time of n-dodecane (internal standard) was 4 min 15 sec
and of (II) I0 min 51 sec. At a column temperature of 200~ the retention time of (I) was
12 min 42 sec and of internal standard was 7 min 20 sec. TLC was carried out on Silufol UV-
254 plates in the system hexane-ether (2:1). Visualization was with ninhydrin after treat-
ment of plates with hydrogen chloride. The Rf of (II) was 0.26 and of ~-isocyanopropionic
acid propyl ester was 0.52. Chromatography on Filtrak P No. 3 (DDR) in the solvent system
tert-butanol--88% formic acid-water (14:3:3) was used for the quantitative determination of
L-alanine. Visualization was with ninhydrin, the Rf of ~-alanine was 0.71. Densitometry
was carried out with the aid of a Vitatron densitometer.
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739592694

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【答案】应助回帖

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RXMCDM: 金币+1, 多谢应助! 2014-03-14 11:01:33
guolianshun: 金币+10, 翻译EPI+1, ★★★很有帮助 2014-03-14 13:54:12
这个貌似是一个物质的测定条件。我翻个大概吧,开始的那个柱子型号,你给你们分析的人看看就行了,我们没必要搞懂。

大致意思是:气液色谱在如下的柱子(LKhM-8MD (model 5) chromatograph 柱子型号with column length 2 m柱长, stationary phase 固定性组成was 15% carbowax-20 M on chromaton N-AW-GMDS 0.16-0.20 nm, carrier gas was helium载气是氦气, 30 ml/min.流速 )中实现。柱温130度 n-dodecane (internal standard内部标准) was 4 min 15 sec  4分15秒and of (II) I0 min 51 sec;柱温200的时候,I的保留时间是12分42秒,内部标准是7分20秒

TLC测定方法:紫外254波长,展开剂:正己烷:石油醚=2:1,板子用氯化氢和茚三酮显色。二的rf值为0.26   

isocyanopropionic acid propyl ester(你的物质) was 0.52(Rf值)。后面的和前面自己看看,差不多就理解了,吃饭去了。
我行我秀,自我本色,不随波逐流。
2楼2014-03-14 10:58:48
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