why we are doing seal wash and needle wash?

Answers were Sorted based on User's Feedback



why we are doing seal wash and needle wash?..

Answer / guest

before starting the analysis of hplc ,previously buffer is
in between the injection needle

Is This Answer Correct ?    8 Yes 1 No

why we are doing seal wash and needle wash?..

Answer / amol kalkute

Because to wash the needle, if we are not doing this it will change the result, unknown peak of previously performed drug substance occur.

Is This Answer Correct ?    3 Yes 0 No

why we are doing seal wash and needle wash?..

Answer / asndranagarjuna

1.Seal wash for reducing back pressure,
2.Needle wash for avoid contamination by syrenge.

Is This Answer Correct ?    2 Yes 0 No

Post New Answer

More Analytical Chemistry Interview Questions

Why does boiler drum ph maintain from 9.5 to 10.2

1 Answers  


what is dissolution

6 Answers   DRL,


What is rs test why we are performing rs test?

0 Answers  


why 0.02% solution toluene &noHexane using in uv calibration?

1 Answers   Graviti Pharmaceuticals, Orbit Pharma, Ranbaxy, Vimta Labs,


what is the film thickness in ftir

8 Answers  






Which type of column should i use to check the purity of high molecular weight protein using HPLC reverse phase column chromatography? Hi everyone. I wanna to check the purity of high molecular weight protein (collagen) with MW of ~130 kDa using a HPLC. I know C18

0 Answers   Petronas, Shanghai Ocean University,


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

0 Answers  


What is the Baseline in HPLC.

2 Answers   Teva API,


What is principle of Polarimeter?

21 Answers   Intas,


what is leading peak in hplc

1 Answers   Cipla,


what is Beer Lambert low ?

8 Answers   MAN,


why we multiply 1000 in the determination of kf factor ?

3 Answers   Stellence Pharm Science,


Categories
  • Organic Chemistry Interview Questions Organic Chemistry (342)
  • Inorganic Chemistry Interview Questions Inorganic Chemistry (123)
  • Analytical Chemistry Interview Questions Analytical Chemistry (1387)
  • Physical Chemistry Interview Questions Physical Chemistry (62)
  • General Chemistry Interview Questions General Chemistry (478)
  • Chemistry AllOther Interview Questions Chemistry AllOther (190)