Why sulfuric acid is used in sulphated ash / residue on
ignition test.
- 9 Answers
- 73884 Views
- CS Pharmaceuticals, Dr Reddys, GVK, HPLC, Micro Labs, Samrudh, Watson Pharmaceuticals, Wings Customer Care, I also Faced
- E-Mail Answers
Answer Posted / dilip m patil
1)The gravimetric technique is used to perform the residue
ignition test or sulphated ash test. The residue obtained
after sulfuric acid treatemnt is chemically and thermally
stable and it fulfiles principles of gravimetric analysis
techique.
2)The residue obtained without use of sulphuric acid are
sensitive to carbon dioxide and moisture present in lab.
atomosphere. Hence the residues composition changes and
ultimately mass of residues changes during final weighing
of residue and the accuracy and precision of test will be
questionable.
| Is This Answer Correct ? | 51 Yes | 6 No |
Post New Answer View All Answers
What is the main difference between ODS1 and ODS2 Hplc column.
In BP2013, Loperamid HCl monograph. Assay by titration with 0.1N sodium hydroxide using hydrocloric acid 0.01N and reading the volume added between the 2 points of inflexion. I have a question that if the diluent solvent is ethanol is certainly consumed a amount of volume of titrant, so this volume must be eliminated on the result calculation or not apart from first point which is subtracted above.
How to choose the which salt is suitable for mobilephase
before starting analytical method valodation what you checking? and how giving preference to start validation?
how decide the clining method and cleaning method validation require for this perticular products?
analytical method validation require to with respect to release specification or shelf life specification?
A ha tc is actual defination of retention time?
CAN WE DETERMINE THE PEAK PURITY IN GAS CHROMATOGRAPHY ANALYSIS?
if you get peak in blank then what require to do?
How to establish relative response factor for hplc. Why it is required?
identification is for unknown? qualification for known? reporting for LOQ?
in which situation require to take incident in validation?
Why we select scan range from higer wavelength to lower wavelength in uv visible spectroscopy and ftir spectroscopy ? .
In which situation we require to prepare the standard solution from sample in Related substance method?
how much mass should be there in volumetric flask while in preparation of sample for assay?
