Detailed Instructions: In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.
Problem:Question: It is very common the use of rotary valves of 6 doors or routes, alternately switchable, for the injection of samples in liquid chromatography of high resolution. Which of the following answers is correct?
Options: <0> In the injection position, the mobile phase flow is maintained towards the column without passing through the loop. <1> In the loading position, the loop in charge of housing the sample remains open to the atmosphere whereby the sample can be deposited by means of a syringe. <2> In the loading position, the mobile phase flow is maintained towards the column by previously passing through the loop. <3> In the loading position, the sample is inserted into the column without disturbing the moving phase step towards the loop. <4> In the injection position, the entire internal volume of the loop is directed to the waste while the mobile phase carries the sample.
Solution:
chemistry