Answer Posted / anupam

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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?

4135

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how to qualify the impurity?

946

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

2222

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how to set sample and standard concentration in RS method?

969

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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

6147

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In rs method development when we are going area normalization method to dilute standard method?

1567

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what is mean by nitrosamine impurities?

1120

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why xterra column require to use at higher ph?

973

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What is control room temperature and which guide line says?

1698

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what is classification of elemental impurities? what is risk assement in elemental impurities?

811

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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?

759

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How doing qbd practically?

1035

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While performing TOC sst analysis Zero shift disabled & sample analysis zero shift enabled why?

2903

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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

1975

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How we choose the mobile phase for method development.?

1273

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