Why sulfuric acid is used in sulphated ash / residue on
ignition test.
- 9 Answers
- 74150 Views
- CS Pharmaceuticals, Dr Reddys, GVK, HPLC, Micro Labs, Samrudh, Watson Pharmaceuticals, Wings Customer Care, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / ravi teja
To convert the inorganic metals into metal sulphates.
| Is This Answer Correct ? | 110 Yes | 11 No |
Answer / ravindra surdikar
sulphuric acid reacts with inorganic compounds and
converted in to there sulphats and oxides
| Is This Answer Correct ? | 70 Yes | 8 No |
Answer / 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 |
Answer / mrutyunjay tripathy
Sulphuric acid is a strong oxidising agent which oxidises
the carbon present in the organic samples resulting CO2 &
H2O and converts the metals into their sulphates which can
be easily extracted to perform the heavy metal test.
| Is This Answer Correct ? | 28 Yes | 3 No |
Answer / mrutyunjay tripathy
To convert the metals present in the sample into their
metalic sulphates which can be easily extracted to perform
the heavy metal test . Infact sulphuric acid is a strong
oxidising agent .
| Is This Answer Correct ? | 9 Yes | 2 No |
Answer / aamir sohail
it converts most of the metals into their sulphates but not all like phosphorus does not converted into sulphates it remain same till the end of the test, than these metal sulphates further proceed for heavy metal test that how much amount of which metal present in it...
| Is This Answer Correct ? | 4 Yes | 1 No |
Answer / r.kadambavadani
To convert the inorganic metals into metal sulphates very easily.
| Is This Answer Correct ? | 4 Yes | 1 No |
Answer / ramesh
sulphuric acid does not absorb moisture and stable the ash
| Is This Answer Correct ? | 2 Yes | 2 No |
Answer / vinod
sulphuric acid added in sample inorganic metal conver to sulphate and oxide
| Is This Answer Correct ? | 0 Yes | 1 No |
plz tall me that any pharmacopeia and guideline is par meted to use 1.68,4.01,7.00,9.00,12.45 buffer for ph meter calibration
why we use TLC?
Why dissolution apparatus having 8 jars ?
how peak can be sharp in hplc when it is come flat
6 Answers Graviti Pharmaceuticals,
How to develop the method when we have very low amount of impurity?
In case of HPLC coloums what is the difference Between C8 & C18 coloums & how can we select difference type of coloums like Inertial ODS , Hypersil BDS , ODS etc.?
What is the principle of hplc detectors like.. UV detector,flurosence detector, RID?
difference between IR & NMR spectroscopy ?
if relative response factor is 1.07, to select how much value
What is the composition of K.F
What is the formula for Tapdensity /
6 Answers Dr Reddys, GR Intrachem,
Why we compare unequal concentrated solutions in heavy metals test. For example comparing the test solution with 1 ppm lead standard and telling it's less than 20ppm?
1 Answers Micro Labs, Mistair,
Organic Chemistry 
