Answer Posted / vaibhav goswami

to check the wavelength accuracy of uv

for inorganic molecules require to do RS, Assay and disso?

670

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Hi sir if any product monograph not given known impurities (may be 5 impurities) specifications then how we require to proceed for inhouse formulation?

654

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

2108

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

1362

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What is the purpose of octyl silane columns?

4250

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what is the acceptance criteria for enteric coated tablets in 0.1n hcl validation in each parameter?

836

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what are the standard methods for HPLC?

2737

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How do we get end points and how many end points are possible for citric acid and di-acid not theorotically answer should be given practically.

2542

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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

1549

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if identification threshold crosses the limits then what next step?

801

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We use hicrome 10 cxs column in hplc analysis....pls tell me.. what is the meaning of 10 cxs?

1676

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effect of pore size, pore volume, partical size, column length, carbon load on retention time? what is carbon load? what is the use?

850

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In which situation we require to prepare the standard solution from sample in Related substance method?

714

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How can I develope method of dissolution by HPLC OR UV

2349

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How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method?

3821

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