Metrohm 861 Advanced Compact IC User Manual

Page 37

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2.6 High-pressure pump

861 Advanced Compact IC / Instructions for Use 8.861.1033

27

tory filled with either isopropanol or methanol/water). If this is not the

case then the pump must first be rinsed with a solvent which is misci-

ble with both the previous eluent and the following eluent (e.g. ace-

tone).

1 Prepare eluent bottle

Prepare, microfilter (0.45

µ

m microfilter) and degas (with N

2

,

He, or vacuum) the suitable eluent for the required applica-

tion and separating column.

Fill eluent into eluent vessel 67 (clear glass, 2 L).

Place eluent bottle 67 at the front in bottle holder 6 on the 861

Advanced Compact IC (see Figure 1).

2 Install bottle attachment

Firmly screw threaded stopper 65 (6.1446.040; part of

6.1602.160) into the smaller threaded opening (M6) of bottle

attachment 66 (6.1602.105; part of 6.1602.160).

Firmly screw aspirating filter 68 onto aspirating tubing 63.

Pull the other end of aspirating tubing 63 through the larger

threaded opening (M8) of bottle attachment 66 from below.

Push O-ring (E.301.0021; part of 6.1602.160) over the free

end of aspirating tubing 63 and move it towards bottle at-

tachment 66.

Push tubing nipple 64 (4.420.4300; part of 6.1602.160) over

the free end of aspirating tubing 63, move it as far as requi-

red towards bottle attachment 66 and screw it loosely in the

larger opening of bottle attachment 66.

Insert aspirating tubing 63 with screwed-on aspiration filter 68

into eluent bottle 67 and screw bottle attachment 66 onto

eluent bottle 67.

Pull aspirating tubing 63 so far through the opening of tubing

nipple 64 that aspirating filter 68 is touching the bottom of

eluent bottle 67.

Fix aspirating tubing 63 in place by screwing shut tubing

nipple 64.

3 Mount CO

2

absorber tube

First place a piece of cotton wool 70 followed by CO

2

ab-

sorber 69 (e.g. Merck soda lime pellets with indicator, no.

6839.1000) in the large opening of absorber tube 72 and then

close it with the plastic lid.

Fasten absorber tube 72 to bottle attachment 66 with the aid

of SGJ clip .

4 Connect aspirating tubing to pump

Insert the free end of aspirating tubing 63 into one of the ope-

nings 8 in the interior of the 861 Advanced Compact IC (see

Figure 2).

Pull aspirating tubing 63 sufficiently far into the interior of the

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