Answer Posted / vaishali

Primary standrds are those standards which is used for
standardisation of volumetric solutions.

Secondary standard is inhouse working standards, which is
evaluted with USP/EP reference standard..

please explain about aluminium hydroxide assay

1127

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

2358

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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

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What is the use of tlc and hplc? And when and where use?

1146

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what is impurity profile. how to interpret this impurity profile to a drug product or drug substance.

2624

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in hplc chromatogram started from left to right and in uv spectrum started from left to right

941

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what is different when impergnated silica plates are used in separation of azo dyes using column chromatography?

2022

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iam usig ph buffers merk. manually how to prepare ?

2269

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from where i get mortar pastle for glass bottle crush? it's required for testing of it?

2260

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in which situation require to change rs specification?

743

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In Dissolution Test why limit is define Q+5% what is the role of +5%.

3093

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If we do accuracy at same concentration at which linearity planned,what is the need to do linearity separately?

2294

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What is rs test why we are performing rs test?

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If vendor having more imp than monograph then how to proceed? and how to set spec?

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

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