Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

How can we detect a compound in hplc which does not have any chromofore?

92

What is similarity factor?

101

What is the difference between the working standard and reference standard?

1 177

WHAT IS THE PARAMETER FOR THE SELECTION OF MOBILE PHASE IN HPLC?

102

CAN WE DETERMINE THE PEAK PURITY IN GAS CHROMATOGRAPHY ANALYSIS?

120

How to do spike of aflatoxin in peanut to get maximum recovery

71

How to fix the sample conc. in Related substances test by HPLC?

55

What is the limit for single maximum impurity limit as per USP??

67

Why we use potassium dichromate in uv calibration Exact reason behind it??

27

UV and PDA detector, which have less signal to noise ratio?

11

Difference between the quantitative analysis and qualitative analysis?

10


Post New Analytical Chemistry Questions






Un-Answered Questions { Analytical Chemistry }

Why do we use KMnO4 in the test of control of obsorbance ? and why do we take specific quantity i.e 57-63mg?

1608


In HPLC Calibration, On which basis RSD Limit of noise test is fixed (NMT 33.0 % )

2279


What is the acceptance criteria for moisture balance when calibrated with sodium sulfate

971


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?

2344


sop of a uv visible spectrophotometer double beam elico model

4506






What is the purpose of octyl silane columns?

3131


Which is the highly polar and highly non polar column in HPLC?

1061


when we talk about change in entropy we consider total entropy means of surround +entropy of system but when we talk about change in Gibss free energy we consider entropy of system.explain with reason.

997


Tell me about analytical method validation in QC

3143


Explain the relations between number of carbon atoms in alkanes and retention time ?

958


How to start the dissolution development for unknown tab?

583


How do we get end points and how many end points are possible for citric acid and di-acid not theorotically answer should be given practically.

1431


What is aggregate and fragments in SEC?

973


In the gas chromatography what is used carrier gas and make up gas?

126


Why Ethanol is Used for Standardization of GC Head space?

2911