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1.What is the difference between method validation and method verification 2.Which guidelines proposed to method transfer
1900My 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
1655We use Potassium Dichromate solution for the calibration of UV-Visible Spectrophotometer in UV region. My question is to calibrate visible region which solution could be used in photometric accuracy
1970Post New Analytical Chemistry Questions
what is difference in ods I ods II is this is realy from sorbent / packing characteristics or from other means
AT WHAT CONDITIONS WILL YOU ANALYSE A SAMPLE,WHICH ARE PRESERVED AT OTHER THAN THE AMBIENT CONDITIONS?(ie COLD STORAGE SAMPLES BELOW 20* CENTIGRADE?
Why sodium hydroxide used for maintain pH of phosphate buffer
What is the principle of Thermal conductivity detector and FID?
Why we use potassium dichromate in uv calibration Exact reason behind it??
analytical method validation require to with respect to release specification or shelf life specification?
How to choose the which salt is suitable for mobilephase
How we can identify process related and degradation impurity in single method with short period?
which are the sizes of capsules?
how much mass should be there in volumetric flask while in preparation of sample for assay?
CAN WE DETERMINE THE PEAK PURITY IN GAS CHROMATOGRAPHY ANALYSIS?
What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio
on saturation solubility study data how we can find out the bcs class of drug?
What is the difference between chromatographic purity and related substances?
How would you decide dissolution medium for NCE compound of class I drug
