Answer Posted / neha tyagi

stable in nature

How we performed the force degradation for drug substance, is any specific guideline is available for each parameter(Acidic, basic, oxidation,heat)? what conditions you mentained for above parameters.

1799

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What is the requirement for brazil in the analytical method vslidation comparr to ich?

276

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How require to develop GC method? how to select diluent, GAS, column selection and other chromatographic conditions?

281

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How to fix the sample conc. in Related substances test by HPLC?

615

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HI,I CLEARED BOB CLERK EXAM. MY INTERVIEW WILL BE ON 9TH OCTOBER,2010.PLEASE SEND ME INTERVIEW QUESTIONS AND ANSWERS. THANK YOU.

1737

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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

1117

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Which is the highly polar and highly non polar column in HPLC?

1787

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Which are the diffrent grades of api in pharma?

317

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how we can identify the impurity is coming below loq at transfering site?

389

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In performance Check of GC Why Hexadecane Peak is Considered 

2560

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WHAT IS THE PURPOSE WE USE HCL, CHOPPER, BURNER, MONOCHROMATOR in AAS? PLEASE EXPLAIN BRIEFLY

2110

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How to choose the which salt is suitable for mobilephase

2659

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is it necessary to do HPLC calibration at wavelength 315nm if we are doing analysis at this wavelangth

1667

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how the compound separate in coulunm,explain

1949

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for heavy metal test lead used in which form pure form or any other form for preparation of lead standard sol

5309

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