Discussion
Which carrier gas gives the flattest van Deemter curve?
Answer: B
Hydrogen has the highest diffusivity, which both lowers the mass transfer term and flattens the curve, so a column can be run well above its optimum with little loss of efficiency and a much shorter analysis. Nitrogen gives the lowest minimum but a sharp curve, and helium sits between. Flatness matters more than depth when speed is wanted, which is why hydrogen has displaced helium wherever its flammability can be managed. A limit that survives making every external component ideal is an intrinsic one, and worth knowing for that reason.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development