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- Posts: 15
- Joined: Thu Oct 15, 2015 1:37 pm
I have Thermo Fisher IC1100 IC with AS9-HC column and AG9-HC guard column.
I have recently completed anaysis of 1000 coal sample for floride and chloride.
After that I run a quality check analysis. Everything looks fine for the 12-13 minutes. Then phosphate and sulphate started comes and they started to overlap. Before these analysis phosphate retention was 17:30 and sulphate 19:30. Now, 14:30 and 16:00.
Need a suggestion for maintance... Or do you suggest to replace guard column or both column.