why using buffers in hplc inteed of water5 8260
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 1213
Why we use methy Ethyl Propylparabine For HPLC Calibration1 3256
What is use of LOD and LOQ in validtion and give range and in calculation why we use 3.3* LOD here why we use 3.32 2908
In specificity what parametrs are consider why that parametrs2 3792
ash or residue in that what will be there.2 3106
what is the differance between Analytical and semi micro balance?2 9222
In 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 8155
In 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 3321
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
What is the main difference between ODS1 and ODS2 Hplc column.
what is difference between UV - VISIBLE MODEL NO like 1600,1601,1700 etc ? plz explain me
Why irmoisture balance is used for corrugated box moisture testing
what type of questions asked on analytical balance and also give answers................all pharma companies?
why we should take dst factor for below 1%moisture samples
Which products will produce when acetic anhydride reacts with Ter-butanol, Sec-butanol, Iso butanol, Dimethylamine etc.
what is third integration
function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?
How to define samples weight in moisture content
Tell me something about Vitamin A test method by HPLC
WHAT IS THE USE OF STARTER ?????????
Ratio of Water and Acetonitrile(diluent) is not recommended to use in cleaning method validation,why?
why sre you used Potassium hydrogen phthalate in standarisation of 1N NaOH and 0.1 N Perchloric Acid?
what is difference between zero air gas and o2 gas