Why we use caffeine for HPLC calibration in Detector wave
ength accuracy test
Answer Posted / ajay
caffiene in needle shape easily dissolve in methanol &
methanol is very chip
| Is This Answer Correct ? | 11 Yes | 44 No |
Post New Answer View All Answers
for heavy metal test lead used in which form pure form or any other form for preparation of lead standard sol
we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion
How would you decide dissolution medium for NCE compound of class I drug
WHAT IS THE PARAMETER FOR THE SELECTION OF MOBILE PHASE IN HPLC?
In BP2013, Loperamid HCl monograph. Assay by titration with 0.1N sodium hydroxide using hydrocloric acid 0.01N and reading the volume added between the 2 points of inflexion. I have a question that if the diluent solvent is ethanol is certainly consumed a amount of volume of titrant, so this volume must be eliminated on the result calculation or not apart from first point which is subtracted above.
if peak get problamatic then what require to do?
in gas chromatography what is the difference between gas flow rate and average linear velocity ?
What is Band broading effect explain
why require to do water content for drug product?
Why we used in n-butyl acetate water content terminology while in ethyl acetate we used moisture content terminology?
Which type of column should i use to check the purity of high molecular weight protein using HPLC reverse phase column chromatography? Hi everyone. I wanna to check the purity of high molecular weight protein (collagen) with MW of ~130 kDa using a HPLC. I know C18
what is mean by dissolution hydrodynamics?
What is the purpose of octyl silane columns?
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
For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?