what is least count of a balance? How we find out this? Any
formula for least count of Analytical balance?
Answer Posted / rajashekar reddy.v (dr reddys)
minimum weight you can measured is called least count of
the analytical balance.By weighing subsequent low weights ,
at which level the weight is not deviating from the
standard weight by 0.01% ,that should be considered as
least count.For denver analytical balances it is 20 mg, for
micro balance is 0.01mgand for pan balance it is 2 gram
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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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