پاورپوینت آشنايي با ستونهاي موئين و انباشته (چگونگي ساخت، مزايا و معايب) (pptx) 151 اسلاید
دسته بندی : پاورپوینت
نوع فایل : PowerPoint (.pptx) ( قابل ویرایش و آماده پرینت )
تعداد اسلاید: 151 اسلاید
قسمتی از متن PowerPoint (.pptx) :
1
به نام
خدا
به نام
خدا
2
عناوين دوره:
آشنايي با ستونهاي موئين و انباشته (چگونگي ساخت، مزايا و معايب)
انواع آشكارسازهاي GC؛ نحوة عملكرد و محدودة عمل
انواع انژكتورهاي GC؛ نحوة عملكرد و موارد استفاده
آشنايي با نرم افزارهاي مورد استفاده در GC
موارد ايمني مرتبط
3
A little history
1903 Tswett - plant pigments separated on chalk columns
Use of gas or vapor as mobile phase:
suggested in 1944 by Martin & Synge
applied in 1951 by Martin & Synge & James (fatty acids)
4
GC Papers presented at the 1956 London symposium
Petroleum & related industries 14 41.2
Other industrial laboratories 10 29.4
Universities 4 11.8
Government laboratories 5 14.7
Scientific instrument industries 1 2.9
Presenter No. of papers %
Total 34 100
GC and petroleum industry
5
GC Papers presented at the 1958 Amsterdam symposium
Petroleum & related industries 9 32.2
Other industrial laboratories 7 25.0
Universities 7 25.0
Government laboratories 2 7.1
Scientific instrument industries 3 10.7
Presenter No. of papers %
Total 28 100
GC and petroleum industry
6
Purpose of Chromatography
Analytical - determine chemical composition of a sample
Preparative - purify and collect one or more components of a sample
7
Chromatography
What IS Gas Chromatography (GC)?
The separation of a mixture by distribution of its components between a mobile and stationary phase over time
mobile phase = carrier gas
stationary phase = packed or open tubular (capillary) column
8
GC classification
Gas Chromatography
Gas - solid
Gas - liquid
Stationary Phase
Sample MUST be volatile at temperatures BELOW 450 C
Pyrolysis GC - heat solid materials to 500 – 1000 C so they decompose into gaseous products
9
Chromatography
Chromatogram - Detector signal vs. retention time or volume