. A retention gap is placed between the injector and the front of the column to Options: A . &nbspretain contaminants and prevent them from reaching the column B . &nbspretain the sample and release it gradually to the column C . &nbspprevent backflush of the injected solution D . &nbspall of the above

. A retention gap is placed between the injector and the front of the colum

Question

. A retention gap is placed between the injector and the front of the column to

Options:

A . retain contaminants and prevent them from reaching the column

B . retain the sample and release it gradually to the column

C . prevent backflush of the injected solution

D . all of the above

Answer: Option A

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Question 1. . Headspace analysis is carried out in order to....

Question 2. . Split injection is carried out by....

Question 3. . What does the retention factor, k', describe?....

Question 4. . Theoretical plates are used to ....

Question 5. . What does the selectivity factor describe?....

Question 6. . Helium is generally preferred as carrier gas over nitrogen and hydrogen because....

Question 7. . The column is heated to....

Question 8. . Sample retention in the column is measured by....

Question 9. . What are the benefits of decreasing the column internal diameter?....

Question 10. . Column bleeding occurs when....

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