What is sulfated ash?
The sulfated ash test utilizes a procedure to measure the amount of residual substance not volatilized from a sample when the sample is ignited in the presence of sulfuric acid. The test is usually used for determining the content of inorganic impurities in an organic substance.
What is ASTM D5185?
The standard method ASTM D5185 is for “Determination of Additive Elements, Wear Metals, and Contaminants in Used Lubricating Oils and Determination of Selected Elements in Base Oils by ICP-OES”. The metallic analytes must be oil soluble for accurate quantification.
How do you calculate sulphated ash?
Boil the ash (Method A or B) with 25 ml of 2 M hydrochloric acid for 5 minutes, collect the insoluble matter in a Gooch crucible or on an ashless filter paper, wash with hot water, ignite, cool in a desiccator and weigh. Calculate the percentage of acid-insoluble ash on the dried drug basis.
Why is sulphated ash used?
sulfated ash test utilizes a procedure to measure the amount of residual substance not volatilized from a sample when the sample is ignited in the presence of sulfuric acid. The test is mainlly used for determining the content of inorganic impurities in an organic compouds.
Why is ash worth?
Ash values are helpful in determining the quality and purity of crude drugs, especially in powder form. On incineration, crude drugs normally leave an ash usually consisting of carbonates, phosphates and silicates of sodium, potassium, calcium and magnesium.
What is ASTM E2412?
The ASTM E2412 test method is a standard practice for Condition Monitoring of Used Lubricants by Trend Analysis using Fourier Transform Infrared (FT-IR) Spectrometry. Results of ASTM E2412 can be combined with TA, TBN and viscosity data, and give detailed and extensive conclusions on the quality of oil.
What is sulphated ash in sugar?
Refined sugars contain small amounts and crude sugars contain larger quantities of inorganic salts, principally sodium chloride. To facilitate destruction of organic matter and production of a uniform ash, sugars are ignited in the presence of sulfuric acid, and the residue is reported as sulfated ash.
What is sulfated ash value?
The sulfated ash value- to measure the amount of residual substance not ignited from a sample when the sample is ignited in the presence of sulfuric acid.
What is difference between sulphated ash and ROI?
THERE NO DIFFERENCE BETWEEN PROCEDURE,BOTH ARE SAME. WE GENERALLY TERM IT AS SULPHATED ASH TEST/ROI.IN INDIAN PHARMACOEPIA,CALLED IT AS ROI AND IN USP,CALLED IT AS SULPHATED ASH TESH. BOTH ARE USED FOR THE DETERMINATION OF CONTENT OF INORGANIC MATTER IN AN ORGANIC SUBSTANCE.
What is sulphated ash in engine oil?
Sulphated Ash is the amount of metallic content that remains as a result of engine oil combustion. These are mostly derived from the engine oil’s anti-wear and detergent additive chemistry.
How ash value is determined?
Subtract the weight of insoluble matter from the weight of the ash; the difference in weight represents the water- soluble ash. Calculate the percentage of water- soluble ash with reference to the air dried drug.
What is the ASTM D 874 sulfated ash test?
Sulfated ash test method (ASTM D 874) has long been used as a quantitative measure of the ash forming metallic constituents in the lubricating oils and additives.
Which is the standard test method for sulfated ash?
ASTM D874-07, Standard Test Method for Sulfated Ash from Lubricating Oils and Additives, ASTM International, West Conshohocken, PA, 2007, www.astm.org
What does the ASTM designation number d874 mean?
An ASTM designation number identifies a unique version of an ASTM standard. Active Standard ASTM D874 | Developed by Subcommittee: D02.03 Book of Standards Volume: 05.01 Translated Version (s): Spanish , Russian , Brazilian Portuguese 5.1 The sulfated ash can be used to indicate the concentration of known metal-containing additives in new oils.
How are sulfated ash values different from elemental values?
5.2 Because of above inter-element interferences, experimentally obtained sulfated ash values may differ from sulfated ash values calculated from elemental analysis. The formation of such non-sulfated species is dependent on the temperature of ashing, time ashed, and the composition of metal compounds present in oils.