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What is the thickness of polystyrene film?
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what is the difference between loss on drying in ordinary oven technique and vacuum oven technique
4 Answers Divis Laboratories, Ranbaxy,
WHY POTASSIUM DICROMATE USING IN UV CALIBRATION
1 Answers Apotex, Micro Labs, Rene,
what is use of acetonitrile compare to methanol in RP-HPLC Method devlopment
when we talk about change in entropy we consider total entropy means of surround +entropy of system but when we talk about change in Gibss free energy we consider entropy of system.explain with reason.
WHY POTASSIUM HYDROGEN PTHALATE IS USED FOR PERCHLORIC ACID? What is difference btw UV detector & RID detector? what is dissolution? What is unit of KF? what is the significant of pH in HPlc?
why KF factor is between 4.5 to 7.5 mg/ml ? why ? why sometime pyridine is used in analysis like in raw material solvent like acetone etc?
11 Answers Aurobindo, GVK, Sohan Healthcare,
why we are using sodium,potassium phosphates for mobile phase preparation?
what are the basic requirement for the WHO audit?
full name of OOS & OOT ? Dercribe it with details ? why this is needed in pharma industry ?
How we can perform Linearity study for validation by HPLC with very low conc of sample
What is the difference between Primay and Secondry Standard ?
6 Answers College School Exams Tests, Neuland,
In UV-VIS spectrophotometer:My diluent is methanol even though i corrected base line for methanol,In my sample scan i found methanol peak.what is the reason?
Organic Chemistry 
