CETAC M-7600 Mercury Analyzer Operator's Manual
CETAC M-7600 Mercury Analyzer Operator's Manual
CETAC M-7600 Mercury Analyzer Operator's Manual
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Operator’s <strong>Manual</strong><br />
Chapter 5: Maintaining the <strong>Mercury</strong> <strong>Analyzer</strong><br />
‣ Inspect the sample peristaltic pump tubing for fatigue and wear. Replace if<br />
too worn or fatigued.<br />
‣ If the pump tubing was left clamped overnight, install new tubing.<br />
‣ Pre-wet the GLS center post and be sure it remains completely wet during<br />
operation.<br />
‣ Check that the liquid flows, to and from the GLS, are smooth. Verify by<br />
close inspection the inlet to the GLS center post and drain exit points.<br />
‣ Be sure the waste bottle will not overflow during the run.<br />
‣ Check that the reagent bottle is sufficiently full for the number of samples<br />
to analyze.<br />
‣ Check that the SnCl 2 is fresh and not precipitated, crystallized, yellowed,<br />
or oxidized or that the small cap on reagent bottle was left open overnight.<br />
Replace if necessary.<br />
‣ For autosampler maintenance, see the appropriate autosampler Operator’s<br />
<strong>Manual</strong>.<br />
Weekly Maintenance<br />
‣ Remove the GLS and clean if residue is building up. See page 112 for<br />
instructions.<br />
‣ Clean the SnCl 2 reagent bottle weekly or before refilling.<br />
‣ Change the pump tubing if it is too worn, appreciably “flattened,” or left in<br />
place overnight.<br />
‣ Empty the waste bottle. Cap all Luer fittings to carry this bottle.<br />
‣ Check the cells and cell windows for cleanliness.<br />
Monthly Maintenance<br />
‣ Clean the GLS. See page 112 for instructions.<br />
‣ Clean the cells and cell windows. See page105 and following.<br />
‣ Replace the GLS inlet tubing and capillary insert. See page 115.<br />
‣ Replace the GLS drain tube. See page 116.<br />
‣ Check that the Perma Pure ® dryer cartridge is still good. A failing dryer<br />
cartridge may be indicated by loss of mercury absorbance sensitivity and<br />
an increase in the baseline of more than 3000 µabs during a short run of<br />
30 minutes or less. If the mercury absorbance for a given standard<br />
solution drops to 50% or more of its original value, change the cartridge.<br />
See page 117.<br />
Yearly Maintenance<br />
‣ Replace the Perma Pure ® dryer cartridge bi-yearly, or as needed. (See page<br />
117.) A failing dryer cartridge may be indicated by loss of mercury<br />
absorbance sensitivity and an increase in the baseline of more than<br />
3000 µabs during a short run of 30 minutes or less. If the mercury<br />
104
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