How to prepare ppm solution of Nacl form its salt?
Answer Posted / mahesh ashok bhiungade
If we want to 100 ppm of sodium solution from NaCl Salt.
Mol. Wt. Of NaCl is 58.5gm per mole
i.e Na+Cl =23+35.5
It means 1gm Na is present in 58.5/23=2.54g NaCl Salt
we know 1 ppm = mg/ 1000ml=0.001g/1000ml.
That means 1gm / 1000ml is 1000ppm
so 2.54gm NaCl (1gm Na)/1000ml = 1000ppm Na
But we Have 100ppm Na solution
2.54 g Nacl have 1000 ppm Na solution
That means 0.254gm NaCl have 100 ppm Na Solution.
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My question about gas chromatography sulfur chemiluminsecence detector. I test unknown sample gas by GC-SCD (calibrated ) and the result of *H2S is 279 PPM , *but when I test the same sample with the GC-TCD (calibrated ) the value of *H2S is 2500 PPM . I'd like to inform you that both GCs are calibrated and have very good operation conditions with stable parameters . the question is if the sample gas with higher H2S over detection limits of SCD detector (1000 ppm). why the result it 279 ppm Best regards
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