What is diffrence between residue on ignition and sulphated
ash?
- 37 Answers
- 191957 Views
- Aurobindo, Cadila, Dr Reddys, Mylan, Panas Pharmaceuticals, Piramal Healthcare, Remidex, Zydus Cadila, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / r.sanjeeverayan
residue on ignition means the residue that left over on
ignition , the residue may be of any kind i.e sulphate, or
TiO2 or some other metal contamination.
Sulphated ash means the ash should be of the sulphate
counterpart
| Is This Answer Correct ? | 191 Yes | 39 No |
Answer / analytical chemist
Residue on Ignition is also known as total Ash.
Diluted sulphuric acid added to the total ash and again
ignited, the residue left behind is the sulphated ash.
| Is This Answer Correct ? | 94 Yes | 25 No |
Answer / gaurav
residue on ignition means sample is ignited at high
temperature and the remaining is the ash.
Sulphated ash means in the above ash add conc.sulphuric acid
and again ignite at high temperature.
| Is This Answer Correct ? | 59 Yes | 17 No |
Answer / sivakumar.a
When a sample is ignited to ash as such this is called residue on ignition as the meaning itself tells us., while the sulphated ash is certain samples need to be charred with sulphuric acid before ignition and the residue contains sulphates which is called sulphated ash. Eventhough USP and BP says the samething this is product specific.
Thanks and regards
| Is This Answer Correct ? | 17 Yes | 3 No |
Answer / g.hamsa
In Residue of Ignition,the sample is ignited at high
temperatures as such,while in Sulphated Ash,sulphuric acid
is used before igniting the sample.
| Is This Answer Correct ? | 34 Yes | 24 No |
Answer / neenie
USP and Pheur (EP) have harmonized the methods. USP
accepts EP method as equivalent. Basically they are the
same tests.
| Is This Answer Correct ? | 33 Yes | 24 No |
Answer / chandrakant padodara
Residual on ignition mesure only present metal in inert
atm.not convert in oxide.
Residual on ignition mesure present of metal oxide in
normal atm.
Sulphated ash mesure only present of metal oxide. using
sulphuric acid.
| Is This Answer Correct ? | 12 Yes | 4 No |
Answer / ravindra surdikar
sulphated ash is the ash of sulphates & residue on
ignition is the residue of sulphates,oxides and TiO2
content or some other heavy metals.
| Is This Answer Correct ? | 9 Yes | 1 No |
Answer / suresh
Residue on ignition means the sample is ignited at higher
temperature in the muffle furnace for the period of time.
If it is not converted as a complete ash(grey colour)add
dilute sulphuric acid to the residue and evaporate the
acidic solution again keep into the furnace to convert ash
is called sulphated ash.
| Is This Answer Correct ? | 12 Yes | 6 No |
why ur using toulene in hexane in u.v calibration?
3 Answers Biological.e.limited, Cipla,
what is mean by ambient temperature?
how much wave length of Soduim vapour lamp used in polarimeter
2 Answers Reddy Labs, Torrent Pharma,
Why pyrene is also use for calibration if detector
whate is difference between calibration and validation
11 Answers Alkem Labs, Cipla, Ranbaxy, Torrent Pharma, Zydus Cadila,
How do u differentiate primary
what is the Bracketing & Matrixing.
What should be the calibration procedure for wavelength accuracy in case of HPLC?
what is the defination of accuracy & presicion?
8 Answers Amneal Pharmaceuticals, GSK,
Why acetonitrile and water are used as extraction solvent when analysis melamine? I thought they are miscible and won't be able to separate...
if rsd failed then what require to do?
what is mean by content uniformity?
Organic Chemistry 
