Answer / santosh

Don't select wavelength nearer to cutoff of mobile phase or prepare mobile phase transpersonal to selected wavelength

Answer / a.iyyappan

Baseline noise can be regulated by using HPLC grade solvents and high purity buffer salts.
Detector wavelength should be follow UV CUTT OFF POINT.

In dissolution of tablets/capsules elaborate the Dissolution limit 20.0% to 60% Q in 30 minutes.

1 Answers  

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what is mean by extactable and leachable study?

0 Answers  

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what is peak purity ??

10 Answers   Cipla, Zyg Pharma,

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Chromatographic Purity is a Qualitative analysis

2 Answers   Shasun Chemicals,

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what king of work is done in Regulatory Affairs in Pharma industry ?

3 Answers   Quintiles,

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which are the guidelines for force degradation studies?

1 Answers  

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hii, i'm had a sample of 1L that gone through extraction & evaporation. i used 0.5ml of methanol for reconstitution before injecting the sample to HPLC. i made a calibration curve using a standard solution but now i'm confused about how to display the concentration i got from the sample. for ex. i got 0.2ug/ml how i'm gonna explane this is for the 1L ? please help .. i'll really appreciate it thanks

1 Answers  

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Why we have to take 42gm of sodium hydroxide instead of 40gm for preparation of 1M Sodium hydroxide as per Pharmacopia? Whether it means the formula for calculating molarity was wrong? 

5 Answers   Claris Otsuka, Ranbaxy,

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From where 16 or 5.545 is derived in theoretical plates calculation formula by USP or JP/BP/DAB and what is meaning of this coefficient and impact in calculation ?

2 Answers   Nectar Lifesciences,

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why kbr is used for pellet preparation in ir spectroscopy, give the reasons? why kbr shows zero dipole moment?

6 Answers  

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Why using 0.5% acetone in methanol mobile phase for HPLC Gradient performance check.

2 Answers   DRL,

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What is the difference between Chromatograhic Purity And Related substances

11 Answers   Cipla,

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