Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what is lod and loq

3 6989

what is lod and loq ?,why use k2cr2o7 , kcl h2so4 in uv calibration ?,why use benzophenone & caffene acetone in hplc calibration ?,what is leading peak in hplc ?why we do the calibration of limit of stry light in hplc & uv ?

Wockhardt,

1973

What is the b/W dead volume and dwell volume ?

2 10435




why r u using hplc grade solvents

4 8059

Why do we use sodium salicylate for Calibration TLC Cabinet U.V Lamps

Matrix, Spar Labs,

1 13466

How do you show that equal quanitities of two isomers provide the same response using a PDA

1 3591

what is GLP? Which industries it requried?

GVK, Aurobindo, AXIS Clinicals,

1 9599

How can we separate Urea & semicarbazide in single HPLC method ?

2 4211




What is the calibration procedure for Malvern MS2000 particle size analyzer and acceptance criteria?

Reddy Labs,

2 2217

why we can use only 4 and 7 and 9 buffers in pH calibration

Cipla, Chola,

1 2208

How to do regeneration of Metacarb Pb plus column?

1181

we calibrate HPLC once in 6 months while iam doing calibration i came to know that calibration was failed. then how can i justify that the samples analyzed on the system during this 6 months was wright? how can i forward in to the next step for those batches?

5 7897

What is the solvent/material used to balance spirit level in analytical balance?

Glenmark, MMC Health Care,

3 8163

why plane of polarized light rotated by opticaly active compunds?

Glenmark,

1 3953

why do we use around only 60 mg of K2cr2o7 in the UV calibration -control of absorbance test?

Reddy Labs,

3 9023


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Un-Answered Questions { Analytical Chemistry }

why we use a particular hplc column for a particular compound give reasons?please

1414


IS THERE ANY EQUIPMENT TO CHECK AND CALCULATE THE POLARITY OF A LIQUID?

1159


what is the purge flow & how to calculate

1094


What is the difference between spectro meter and spectro photo meter?

8178


Describe your field experience sample type collected,sample techniques,field measurements taken and equipment used?

1370






Why potassium dichromate is used in calibration of uv?

178


What should be the level/ Percentage of Arsenic in Arsenic free zinc.

952


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

240


what is difference between zero air gas and o2 gas

5448


Why irmoisture balance is used for corrugated box moisture testing

966


calibrtion procedue of LC-MS

1171


Tell me something about Vitamin A test method by HPLC

1256


how can give the expiry period and restadardisation of volumetric solution

1208


what is the principle involved in turbidometry and nephelometry ?

2159


%lod always grater than %water content for same product??

8