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?

1463

what is third integration

1504

Why Ethanol is Used for Standardization of GC Head space?

3724

How to know the estimated LOQ concentration in ppm

739

which situation gc hs and gc als require to use?

301

How do we fix the sample concentaryion in hplc method development?

676

How we can identify process related and degradation impurity in single method with short period?

340

[3/28, 20:52] Manoj P Venkatpurwar: how many impurities require to inject in assay specificity that how we can find out? and in Rs also how?

358

how will you do the prep for unstable componds?

1443

in monograph 7 imp are there but in vendor showing 5 imp do not req to include 2 imp for that what will be justification?

271

what is the importance of peak purity in HPLC and how we can calculate through manul(not software)?

3996

Why we used in n-butyl acetate water content terminology while in ethyl acetate we used moisture content terminology?

1380

How they found 1mL of K.F reagent is equivalent to 5mg of water and if we change the composition of K.F reagent, is it can neutralize more amount of water?

1311

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

5315

inhouse product is in capsule form in combination and RLD is in tablet form then can we proceed for multimedia CDP? in inhouse capsule product disso is paddle with sinker in release media is there then RLD product in tablet form then with same as paddle with sinker we can proceed n.a.?

296