Answer Posted / padmarao

methonl is reacts with ketones to form water so wecare used to
pyridine as a solvent

in which situation require to change rs specification?

758

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Identify problem faced when mass spectroscopy is used with HPLC system ?

1889

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what is mean by extactable and leachable study?

1184

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how many types of balance calibration test?

2309

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if you have given a blank water how you analyse by general analytical techniques?

2037

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why should we perform dissolution PVT calibration only by UV spectrometer, not by HPLC ?

1718

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Why we select scan range from higer wavelength to lower wavelength in uv visible spectroscopy and ftir spectroscopy ? .

918

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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

1925

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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

1607

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why does used dry caffien in HPLC calibration?

2038

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on the basis of bcs class how to proceed the solubility?

790

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how to select short coloum and long coloumn for new molecule

2458

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what is definition of validation? which components are followed give detail?

2381

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if identification threshold crosses the limits then what next step?

877

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if content uniformity passing but dissolution varrying then what is next step?

886

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