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- Posts: 1
- Joined: Thu Apr 18, 2019 3:34 am
I am new to ion chromatography, and to the company wherein I work. How often should a calibration be performed on a Metrohm 940 IC that analyzes chloride and sulfate on boiler and condensed steam water samples (power plant industry here) twice a shift on a daily basis? The quantity of samples run through the IC is usually ~10 samples per shift.
We have a young, experienced chemist who calibrates the instrument every 3 days or so because his check standards fail their theoretical concentration. I have worked with HPLC and GC before, but I have never found the need to calibrate the instruments in at least month. This is my first time seeing an instrument being calibrated in at least 2 times a week.
Any thoughts on this? Does anybody, especially from the power industry handling the same type of analysis on the same type of samples, have an opinion on this? I would love to hear and learn from all of you.
Many thanks in advance.