Answer Posted / s jagadeesh chandra

Thermally liable compounds are dried in hot air oven.
Thermally un stable compounds are dried under vaccum.
Vaccum is applied to prevent sample loss due to
splashing,foming.Low boiling samples are dried under vaccum.

in which situation require to use paddle and basket?

729

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What is the acceptance criteria for moisture balance when calibrated with sodium sulfate

2031

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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

1587

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how can give the expiry period and restadardisation of volumetric solution

2582

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

755

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Which parameters require to do in tech transfer?

748

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What should be the level/ Percentage of Arsenic in Arsenic free zinc.

2219

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Why acetonitrile and water are used as extraction solvent when analysis melamine? I thought they are miscible and won't be able to separate...

1676

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why multimedia dissolution require to do?

806

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for which product require to do content uniformity? what is limit of cu?

805

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

779

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

3089

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Explain the relations between number of carbon atoms in alkanes and retention time ?

2135

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in OSD forms require to use gas chromatography?

825

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What is a difference between potency and purity?

1202

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