Analytical Chemistry Interview Questions
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inhouse product is in capsule form in combination and RLD is in tablet form then can we proceed for multimedia CDP? in inhouse capsule product disso is paddle with sinker in release media is there then RLD product in tablet form then with same as paddle with sinker we can proceed n.a.?

276

Ph meter can show more than 14 ph reading? Why ph range in between 1 to 14 only?

293

How to set specification of assay, fisdolution and related substances?

350

how to qualify the impurity?

306

what is the acceptance criteria for enteric coated tablets in 0.1n hcl validation in each parameter?

324

What is the formula for relative diffrence for standard solution in solution stability in validation?

291

How require to perform linearity as per ANVISA? What are the acceptance criteria?

698

[3/30, 13:29] Manoj P Venkatpurwar: How hplc column selection according to structure? How mobile phase buffer selection on molecule structure?

297

in DMF having extra impurities and in api COA also having extra imp than USP or BP product then how require to proceed?

333

we can use expired sample for validation and analyst qualification?

287

If vendor having more imp than monograph then how to proceed? and how to set spec?

323

If change in specification which parameter require to do for validation? if change in chromtographic condition then which parameter? if api change then which parameter? if change composition then which parameter? if old method not work out then whicj parameter? if additional one impurity added then which parameter of validation require to do on above each conditions? elaborate separately

341

how require to set assay concentration for standard and sample?

349

What is dose dumping? why require to do?

278

Please give idea about method development for cleaning method and how maco level establish

258


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Un-Answered Questions { Analytical Chemistry }

In which situation we require to prepare the standard solution from sample in Related substance method?

273


how decide the clining method and cleaning method validation require for this perticular products?

288


what is the acceptance criteria for enteric coated tablets in 0.1n hcl validation in each parameter?

324


How do we fix the sample concentaryion in hplc method development. What is the basis?

662


please explian me about area normalisation method,diluted standard method,impurity vs impurity and which one has to be selected in method development

1088






What is the main difference between ODS1 and ODS2 Hplc column.

4439


What is aggregate and fragments in SEC?

1563




1804


What is column in chromatography?

1749


we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion

1344


How can we calculate "confidence interval" in analytical method validation? Pl. explain with example.

3573


Ratio of Water and Acetonitrile(diluent) is not recommended to use in cleaning method validation,why?

2458


can we use the same detector in HPLC as well GC and what could be the differences we can find in the final chromato graph in any aspects?

1693


How to calculation of residual solvent methanol (3000 ppm) standard solution, and how many quantity used of test sample

2510


what is mean by dissolution hydrodynamics?

331