Why we have to take 42gm of sodium hydroxide instead of 40gm for preparation of 1M Sodium hydroxide as per Pharmacopia? Whether it means the formula for calculating molarity was wrong?3 4851
what is internal standard define2 1247
What are the parameters for the method development of Gas Chromatography and GC-HS?2 2752
how much mass should be there in volumetric flask while in preparation of sample for assay?1105
U have 4 strengths have different coating meterial which one u chose to do forced degradation stady in validation1 1831
Tell me about analytical method validation in QC1599
what is difference between UV - VISIBLE MODEL NO like 1600,1601,1700 etc ? plz explain me
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 principle of UV Vis spectroscopy, AAS, ICP OES,ICPAES, ICP-MS and FTIR
Why acetonitrile and water are used as extraction solvent when analysis melamine? I thought they are miscible and won't be able to separate...
How to do regeneration of Metacarb Pb plus column?
Why a1% value is used for some product ? What is the criteria for selection a1% value ?
What is Band broading effect explain
2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.
While performing TOC sst analysis Zero shift disabled & sample analysis zero shift enabled why?
Which type of column should i use to check the purity of high molecular weight protein using HPLC reverse phase column chromatography? Hi everyone. I wanna to check the purity of high molecular weight protein (collagen) with MW of ~130 kDa using a HPLC. I know C18
What is the principle of Thermal conductivity detector and FID?
USP methodology, EP methodology, IP methodology, among three if possible to use one methodology for qualify working standard to use USP, EP, IP ? Please explain...
Can we interpret accuracy from linearity in method validation?
how much mass should be there in volumetric flask while in preparation of sample for assay?
Why Ethanol is Used for Standardization of GC Head space?