Answer Posted / anusha
ppm means parts per million solution...
ppm solution is prepared by dissolving 1mg in 1 litre solution i.e 1mg/1000ml
or
1ug/ml solution is also called as 1 ppm
| Is This Answer Correct ? | 12 Yes | 1 No |
Post New Answer View All Answers
what is the extinction coefficient for Indomethacin or at 319nm wave length.
Qc interview questions
A ha tc is actual defination of retention time?
What is similarity factor and its use in api strength?
From where require to take the RLD sample?
How to determine the EDTA content by potentiometry titration in Ceftriaxine sodium
What is the formula for relative diffrence for standard solution in solution stability in validation?
in monograph 7 imp are there but in vendor showing 5 imp do not req to include 2 imp for that what will be justification?
what is mean by covalidation
What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio
What is third generation HPLC Columns?
What is delay volume?
in which situation require to use paddle and basket?
what is mean by 40 in the dissolution basket mesh size?
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
