What is primary & Secondary Standard ? Give Example

17 Answers   Cipla, Lupin,

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What is the difference between Normal phase method & Reverse method in HPLC ? Define application of both method.

4 Answers  

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what is the conductivity of hplc grade water?

4 Answers  

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What is linearity in hplc and how to calibration

1 Answers   Aurobindo,

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In chromatograpbic purity 90% is there, in assay 70% is there. How will you prove remaining 30%.

3 Answers   Dr Reddys,

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Any molecule is filing for ANDA purpose, what are the dissolution requirements / specifications needed ?

1 Answers   IPCA,

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what is the meaning of stress study?

2 Answers   Reddy Labs,

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water is more polar than acetonitrile.but in reverse phase chromatography peaks elute earlier when we increse Acetonitrile.what is the reason.

10 Answers   Matrix,

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In C8,C18....etc have 4&5 etc... microns Columns is there like that how to separate Chiral columns as per Micron size?

1 Answers  

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WHY POTASSIUM DICROMATE USING IN UV CALIBRATION

1 Answers   Apotex, Micro Labs, Rene,

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acceptance criteria for ph meter, hplc detector,pump,injector,oven when we calibrate.

3 Answers  

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how can you decide API molucule acedic or basic compound by test?

2 Answers   Posh Chemicals,

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