How much carbon loading in nomalphase columns?
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Answer / ajinkya
it contain only silica, and in reverse phase c8 and c18
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Answer / umesh chand
Normal phase column have no number of carbon ,its having silica gel particle coated with cellulose (3,5-di methylephenylcarbamate) and amylose (3,5-di methylephenylcarbamate)
like CHIRALPAK-OJ-H,CHIRALPAK -IA ,IB ,IC and etc.
'' polar stationary phase and nonpolar mobile phase'' use in normal phase chromatography
but carbon having hydrophobic nature, therefor we can't carbon loading in normalphase column.
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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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