Answer Posted / dinesh gurav
Recrystallisation is a crystallisation process of impure or
crude solid materials in different solvents and at diff.
experimental parameters like temp,pH and quantity of
solvents to elute out the unwanted compounds
[Impurities,Polymorphs] to get a compound of desired
quality.
| Is This Answer Correct ? | 4 Yes | 2 No |
Post New Answer View All Answers
[3/30, 13:29] Manoj P Venkatpurwar: How hplc column selection according to structure? How mobile phase buffer selection on molecule structure?
what type of questions asked on analytical balance and also give answers................all pharma companies?
In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?
why we are using hexane in calibration of number of drop per mL
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 ?
what parameters we will consider while developing a HPLC method and how we confirm our HPLC method is valid?
How to calculate coreletion coefficient
using gradient pressure in gas chromatography are not ?using gradient pressure why
how to qualify the impurity?
AT WHAT CONDITIONS WILL YOU ANALYSE A SAMPLE,WHICH ARE PRESERVED AT OTHER THAN THE AMBIENT CONDITIONS?(ie COLD STORAGE SAMPLES BELOW 20* CENTIGRADE?
in hplc chromatogram started from left to right and in uv spectrum started from left to right
why xterra column require to use at higher ph?
mahagenco syllabus for the post of chemist
what type of question will ask in the interview of lab chemist.
sop of a uv visible spectrophotometer double beam elico model
