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test tungsten purity
It is the purity of the platinum. 850 is 85% pure. 900 is 90% pure. 950 is 95% pure.
You test it by checking the melting point
There are various ways to stamp Platinum. PT, Platinum, Plat. Depending on the purity of the platinum the stamp can also vary. PT950, PT850, PT900. PT950 means that 950 out of 1,000 particles of the metal is platinum.
Platinum is a metal. It is in the p block.
The best and trusted way is by chemical test
Carats is used especially for gold (as an equivalent of gold percentage).
Plat stands for Platinum, and the 900 indicates purity, or 90% pure.
Bisleri
monkey
Purity tests are used to determine the extent to which a particular substance is what is claimed. A classic purity test for gold is nitric acid; if the item being examined reacts to the acid it is not gold, or at least not pure gold.
Ephedrine can show a false positive for amphetamines on a drug test.