what are peak purity,peak purity index,peak thresold2 13951
1)why use benzophenon,uracil in hplc calibration. 2)why use sucrose in polarimeter calibration. 3)what is S/N ratio, noise and drift in hplc 4)how we can find lod and loq in method validation1 12004
Why we are using K2Cr2O7 for control of absorbance in UV?2 11122
1 why polyesterene film used for ftir calibration ? 2 why k2cr2o7 is used for control of abs in uv ? 3 why holmium oxide used for control of wavelength in uv3 10112
what is the principal of malvern particle sizer & its used in pharma industry3 6463
In lcms analysis some times we get sodium and potassium adducts. if the compound is havine sodium ions how can we confirm wether sodium is from sample or it is a adduct?2 5541
same sample on two preapration gives differnt result during hplc analysis3 5642
Why we are using a Kf Factor range 4 to 67 42825
What is difference between Chromatographic purity and Related substances analysis?3 19737
what is procedure of actual procedure for registration of drug?
why should we perform dissolution PVT calibration only by UV spectrometer, not by HPLC ?
What is the diference between residual solvents and organic volatile matter
What is the difference between spectro meter and spectro photo meter?
which one is better separation in high pressure liquide chromatogram orlowpressure chromato gram in hplc
A ha tc is actual defination of retention time?
Why we check moisture,ash & AIA in product
what is turbidimetric titration?Give 2 examples.
Why do we use KMnO4 in the test of control of obsorbance ? and why do we take specific quantity i.e 57-63mg?
I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?
What is the principle of HPLC, GC, LCMS, GCMS,LC QQQ, GC QQQ, LC Q TOF and GC Q TOF. What are the applications and Specificity?
why are measure gas flow " ml " in Gas chromatography
why glutent are detected in the rice cereal baby food product even manufacturer claimed that they are using rice and milk only?we have using ELISA to do the test,and rice supposed not containing any glutent,rite?We already repeat the test so many times and it still detected.just wondering where the glutent came from?
CAN WE DETERMINE THE PEAK PURITY IN GAS CHROMATOGRAPHY ANALYSIS?