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What are the primary standards?
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Answer / ch.madhava reddy
A primary standard is a reagent that is extremely pure,
stable, has no waters of hydration, and has a high molecular
weight.
| Is This Answer Correct ? | 29 Yes | 4 No |
Answer / kishor solanke
A reagent of high purity and non-parmacopoeal, which is
stable with respect their charactristic property at NTP.
Which is generally used for standardization only.
| Is This Answer Correct ? | 13 Yes | 4 No |
A primary standard is a reagent which is very pure,
representative of the number of moles the subatance
contains and easily weighed.Primary standards are typically
used in titrations and other analyticaL techniques as
standardization solutions
| Is This Answer Correct ? | 2 Yes | 1 No |
Answer / ram krishna
Primary standard are highly purify and none degradable
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / nagaraju
It should be nothydroscopic and stabule Compltly solubule in spacified solvents
| Is This Answer Correct ? | 0 Yes | 1 No |
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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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Organic Chemistry 
