Page 230 - Applied Pharmacognosy

B-capillary column

1- On column injection, into stationary phase
B- Split/splitless injector

split /splitless injector
For samples that do not decompose above their b.p.

Split injection mode:
most commonly used
The injected volume is further reduced (10:1 or 100:1)

Splitless injection mode:
Used for trace analysis (sample amounts are < 200 ng) .

With splite valve off, sample vaporized and carried onto column

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