I've tested some water samples recently to get TOC value. There are 16 samples in total, each 4 samples have pH of - 4,7,10 and 13. The TOC concentration for pH - 4,7 and 10 is pretty similar (around 1mg/l) but for 13 pH the TOC concentration is very very high (around 25 mg/l). The samples were made from deionized water and the only chemicals it contains are NaCl and NaOH, with no additional organic compound. This is why I cannot understand the reason behind the high TOC concentration for only the 13 pH samples.
Auriane Diamand
Dear Sarajeen,
Which method do you use to measure TOC ? Is it TC-IC, that is a substraction of total carbon and inorganic carbon ? In that case, you need to increase the acid injection to lower the pH of your sample from 13 to
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