Answer Posted / chiran13

elution order in GC analysis completely depends on Volatile
nature of solvent ie Boiling point of respective solvent
which has high BP will elute later than the earlier BP
contained solvent

I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?

3541

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for which product require to do content uniformity? what is limit of cu?

821

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What is the acceptance criteria for moisture balance when calibrated with sodium sulfate

2046

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what is lod and loq ?,why use k2cr2o7 , kcl h2so4 in uv calibration ?,why use benzophenone & caffene acetone in hplc calibration ?,what is leading peak in hplc ?why we do the calibration of limit of stry light in hplc & uv ?

3669

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if you get peak in blank then what require to do?

980

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what is procedure of actual procedure for registration of drug?

2012

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Colorimtry

1667

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WHAT IS THE PARAMETER FOR THE SELECTION OF MOBILE PHASE IN HPLC?

1196

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What is the formula for relative diffrence for standard solution in solution stability in validation?

811

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can i use hplc detector to uplc and why?

2295

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We use Potassium Dichromate solution for the calibration of UV-Visible Spectrophotometer in UV region. My question is to calibrate visible region which solution could be used in photometric accuracy

1909

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Why use only methanol,used determinationof moisture content not use other solvents

1416

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A ha tc is actual defination of retention time?

1618

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how require to select dissolution media? what is discrimination?

795

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What is a difference between potency and purity?

1224

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