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?

1973

How to calculation of residual solvent methanol (3000 ppm) standard solution, and how many quantity used of test sample

3242

In which situation we require to prepare the standard solution from sample in Related substance method?

777

What is diffrence between extractable volume and deliverable volume? Answer pls

4573

what is biorelivent dissolution media?

807

process of Diclofenac sodium,IP.

2211

For standardization of volumetric solutions, acceptance limit for concentration is considered as 10% of nominal concentration and %RSD as NMT 0.2% (for appropriate no. of replicates). But , if %RSD has not met, what should be further action?

1907

Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?

2184

How require to develop GC method? how to select diluent, GAS, column selection and other chromatographic conditions?

734

for heavy metal test lead used in which form pure form or any other form for preparation of lead standard sol

6070

Basic principle of ESI?

2151

in which situation ion pair agent require to use?

737

Tell me about analytical method validation in QC

6181



2321

[3/30, 13:29] Manoj P Venkatpurwar: How hplc column selection according to structure? How mobile phase buffer selection on molecule structure?

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