Analytical Chemistry

  Home  Chemistry  Analytical Chemistry


“Analytical Chemistry job interview questions and answers guideline. Lean Analytical Chemistry and get preparation for the job of Analytical Chemistry”



27 Analytical Chemistry Questions And Answers

22⟩ IN pH CALIBRATION,CALIBRATION IS DONE FOR pH METER OR ELECTRODE?HOW WILL YOU JUDGE THAT THE METER TO BE CALIBRATED WITH 4,7,9.2 BUFFERS?EXPLAIN TEMPERATURE EFFECTS ON pH?

calibration is also one of the system

suitability test,whether the system working satisfactory or

not physically so when you do the calibration for pH meter

with standard pH buffer solution (which is from NIST-it may

accurate solution for actual pH)and once if your instrument

has calibrated,you can cross verify your insrument against

those pH buffer solution (NIST) and the acceptable range is

+/- 0.02 then you can conclude for ?

once if temperature raises the pH will decrease and its not

all cases

 121 views

24⟩ WHAT IS USE OF ION PAIR REAGENTS?

The chemical substances that pair each other, to form

complexes. These can use for stabilization of one of the

molecule that is more active or to colorifying etc.

 139 views

25⟩ Explain What is a base line?

#Base line is nothing but the detectors response to the

mobile phase.(gc,hplc)

#Base line should be stable to start a run.

#Un stabilized base line is called as base line noise.

#Base line noise is of many types..

1)Cyclic base line

2)Synchorinise noise

3)Asynchorinise noise

4)Base line drift

5)Spikes

6)Negative peaks

7)No peaks

#Base line noise is attributed due to mobile phase,sample,

system problems.leaks in the system,temperature variations

in lab etc..

 139 views

26⟩ What is Standard deviation?

Standard deviation tells about the widely spread out of the

measured analytical data points. Highly precised

measurements are less standard deviation.

 178 views