what is the meaning of linearity,principle of co-relation coefficient?3 5968
In UV we measure absorbance , how it is happend ? explain me4 6932
why we are performing residue on ignition?6 12519
why we are performing residue on ignition?2 6652
NMR is both qualitative and quantitative?EXPLAIN2 4109
HOW TO CALCULATE THE MASS OF UNKNOWN IMPURITY IN LC-MS? AND WHAT IS THE ROLE OF FRAGMENTATION IN LC-MS ?1 3925
WHY given much noise PDA dector then VWD Dector
How we performed the force degradation for drug substance, is any specific guideline is available for each parameter(Acidic, basic, oxidation,heat)? what conditions you mentained for above parameters.
For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?
What are modes of quantification in related substances
What is Band broading effect explain
why does used dry caffien in HPLC calibration?
if you have given a blank water how you analyse by general analytical techniques?
what is the limit for KF Factor ,we take factor using water we will found factor between 6 to 7 ,while on KF Reagent bottle mentioned 5 mg/ml water content.if we not use dried methanol it is effect on factor.
How can the GC or HPLC method is selected to determine the impurity profile in drug product?
Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?
why disodium tartarate used in karl-fischer instrument ?.
I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?
In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?
Why acetonitrile and water are used as extraction solvent when analysis melamine? I thought they are miscible and won't be able to separate...
why equlirium conatant of water have 14 value