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for heavy metal test lead used in which form pure form or any other form for preparation of lead standard sol
1 5998we run the same sample in same method in different flow rates in HPLC,any changes in sample analysis?
2 7405For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?
4011For titration in anhydrous media with perchloric acide, if lack of titrator, Which indicator is been used for replacement. How calculate pH of test solution to choose suitable indicator?
2265stability study is going on up to 3years for famotidine-USP but the pharmacopeia is revised and tlc test is replaced with hplc test. At the 4th year frequency the product is failed in hplc test .how can i assain the expiry or retest date and can i stop or continue the programme?
2 6513Post New Analytical Chemistry Questions
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
Which parameter require to do for analytical method equivalency?
Tell me something about Vitamin A test method by HPLC
Why only 1.2 million lux hours require in photostability study?
Why potassium dichromate is used in calibration of uv?
Why we used in n-butyl acetate water content terminology while in ethyl acetate we used moisture content terminology?
Why six unit used for precision?
effect of pore size, pore volume, partical size, column length, carbon load on retention time? what is carbon load? what is the use?
How to determine water content of bis tetrazole amine mono ammonium salt
What is the difference between Discriminating media and DPDM(Dissolution Profile with Different Media)
give clarity of linearity and range in method validation
why should we perform dissolution PVT calibration only by UV spectrometer, not by HPLC ?
which situation gc hs and gc als require to use?
What is the accrptance criteria in RSD for RS method precision on basis of impurity percentages?
what is definition of validation? which components are followed give detail?
