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Why no peak; missing 4 ions in IC testing

Discussions about HPLC, CE, TLC, SFC, and other "liquid phase" separation techniques.

2 posts Page 1 of 1
Hello

I'm using LC20 Dionex Ion Chromatography System.
Testing for an ion contamination in precision plastic parts.

When i calibrated using 25ul Mix 4 (F-20ppm,Cl 40ppm, NO2 40ppm, Br 40ppm, NO3 40 ppm, PO4 40ppm & SO4 40 ppm) standard solution in 100 ml DI water in 100ml flask, some of the ions didn't show any peaks in result.

I ran with the DI water first for 2-3 times before inject my calibration sample.
When I observe some peaks are missing, I prepared the std again and try agin but still the same.
How can I solve this problem?
Thanks in advanced,
Tom.
Josep Tom,

There are range of possible causes for this but it would help to know which ones were missing in order to narrow down possible causes. Can you elaborate?
2 posts Page 1 of 1

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