Answer Posted / dinesh solanki

Custom calculation is calculation done by waters softwere instead of validate excel.By custom you calculate the results online, assay,RS, single point and profiling dissolution.For this calculation we make some field and we add std, SPL wt and other required details. Initially it difficult but then it was very easy, time saving and error less calc.

As per ICH related substances stability trend limit from initial to shelf life

3301

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what type of question will ask in the interview of lab chemist.

3362

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If combination product how require to identify which imp is of which api?

864

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From where require to take the RLD sample?

804

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pharma industries oriented

2294

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What is similarity factor and its use in api strength?

1363

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I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?

3578

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How require to perform linearity as per ANVISA? What are the acceptance criteria?

1400

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can i use hplc detector to uplc and why?

2347

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What is the purpose of octyl silane columns?

4335

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In the HPLC Calibration done wavelength accuracy done between 200nm-280nm .but not done remaining 300-400nm not done ?

974

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how to qualify the impurity?

942

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How to calculation of residual solvent methanol (3000 ppm) standard solution, and how many quantity used of test sample

3327

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if identification threshold crosses the limits then what next step?

915

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

1784

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