Metrohm 850 Professional IC AnCat MCS User Manual download pdf (Page 50)

2.13 Sample degasser

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850 Professional IC – AnCat – MCS

2.13 Sample degasser

The sample degasser removes gas bubbles and disolved gases from the

sample. For degassing, the sample flows into a vacuum chamber through

a special fluoropolymer capillary.

Gas bubbles in the sample lead to poor reproducibility, as the quantity of

sample in the sample loop would not always be the same. Samples (con-

taining gas) should therefore be degassed before injection. For this the

sample is sucked through a degasser chamber before injection, whereby

any gas bubbles are automatically removed.

Note

When using the sample degasser, the rinsing time extends by at least 2

minutes.

Figure 22

Sample degasser

Sample degasser input

Sample degasser output

PEEK pressure screw, long 6.2744.090

Connection capillaries 6.1803.040

Connecting the sample degasser

Remove and keep 6.2744.220 thread stoppers from the input and

output of the sample degasser.

Connect the end of the 6.1803.040 sample aspirating capillary con-

nected to the injection valve with a long PEEK pressure screw (22-3)

to the output of the sample degasser (22-2).

Connect 6.1803.040 connection capillary with a long PEEK pressure

screw (22-3) to the input of the sample degasser (22-1).

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Metrohm 850 Professional IC AnCat MCS User Manual Page 50