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How long we can use hygroscopic reference standard in terms of water absorb.I mean in line with respective monograph's specification or more than that?
1 3137What is use of LOD and LOQ in validtion and give range and in calculation why we use 3.3* LOD here why we use 3.3
2 6855In the method validation proceedure,lod & loq calculation we use the formulae for LOD=3.3*SD/slope and for LOQ=10*SD/slope,why we use 3.3 & 10 in the formulae?
1 11033In HPLC Chromatographic separation Resolution equation is Rs = 1.18 (tR2 –tR1)/wh1+Wh2, Where, tR2 and tR1 is run time of eluent ratios of the distances from the point of application to the centers of the spots and the distance travelled by the solvent front from the point of application (retardation factor), and Wh1and Wh2 , is peak width of at half height. What is 1.18 ?
1 7322Post New Analytical Chemistry Questions
What is control room temperature and which guide line says?
Please tell me about the pH of Polycaboxylic ether is it in the 5-6 range ever or more than 6
My question about gas chromatography sulfur chemiluminsecence detector. I test unknown sample gas by GC-SCD (calibrated ) and the result of *H2S is 279 PPM , *but when I test the same sample with the GC-TCD (calibrated ) the value of *H2S is 2500 PPM . I'd like to inform you that both GCs are calibrated and have very good operation conditions with stable parameters . the question is if the sample gas with higher H2S over detection limits of SCD detector (1000 ppm). why the result it 279 ppm Best regards
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.
on saturation solubility study data how we can find out the bcs class of drug?
calibrtion procedue of LC-MS
why we use a particular hplc column for a particular compound give reasons?please
how you start RS method development when for new product?
please explain about aluminium hydroxide assay
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?
Ratio of Water and Acetonitrile(diluent) is not recommended to use in cleaning method validation,why?
how many types of balance calibration test?
Is it nessesary all multimedia dissolution require descriminatory?
what type of question will ask in the interview of lab chemist.
How do we get end points and how many end points are possible for citric acid and di-acid not theorotically answer should be given practically.
