Answer Posted / dignesh udwadia

sucrose is high oxidation and 1,4-benzoquinone is vary low oxidation to cover higher and lower oxidation range we are used above mention material for calibration.

WHY pKa value is more important than pH value of the mobile phase in HPLC?

1747

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analytical method validation require to with respect to release specification or shelf life specification?

768

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How to decide assay range for non pharmacopeial API analysis by HPLC? Could you give me any reference for same e.g Guidelines or Paper publications?

3337

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Many times I don't got a caffeine peak in calibration of hplc using guard column ❓

1794

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How do we quantify crystaline and amarpous forms by using (NMR, XRD)spectroscopic techniques? Which any others instruments are useful for this quantification? explain

2374

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What is rs test why we are performing rs test?

1835

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what is mean by nitrosamine impurities?

1051

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if identification threshold crosses the limits then what next step?

844

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What if impurity area in control sample coming more as compared to LOQ level of impurity ?

1583

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calibrtion procedue of LC-MS

2693

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what is difference between UV - VISIBLE MODEL NO like 1600,1601,1700 etc ? plz explain me

2656

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what is the difference between potentiometric titration and karl fischer titration?

3164

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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?

4048

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

720

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What is a difference between potency and purity?

1190

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