If the authenticity of the purchased jewelry made of platinum is in doubt or you want to distinguish platinum from several options like metal, try these tips.
Take a common medical iodine and drip on the test item. If a single drop of dark — so, before you do the precious metal. Note, however, that the darker the stain, the higher the fineness of the product.
If you have access to concentrated nitric and hydrochloric acids, as well as experience in dealing with them, make so-called "Aqua Regia". To do this is to mix acid in the ratio 1: 3 (nitric and hydrochloric).
Place the product into solution. Platinum will dissolve in hot water. In the cold it will not happen. Naturally, the fake platinum will immediately begin to dissolve in the cold mixture.
If you have glass-blowing burner, you can try to heat the product. If the metal is incandescent, but has not started to melt, it is likely to you is platinum. Although it is worth considering that palladium and iridium can act in a similar way. However, palladium will dissolve in nitric acid, and platinum — no.
Check for the presence of oxides on the product. Noble metals do not oxidize. Aluminium, for example, when contact with air is covered with an oxide film (passivated), which prevents its further destruction. Platinum is not threatened
If it is possible to violate the integrity of the experimental sample, then try to use it as solder. Uniform distribution of the metal tip of the iron is also indicative of the noble origin of the product.
Also you can check the metal with ammonia. When interacting with platinum, ammonia doesn't cause any darkening that happens in the interaction with other metals.
Advice 2 : How to check the quality of vodka
Now a huge number of people poisoned by substandard alcohol and this is happening not only in our country but also abroad. It is often a violation of the process of making vodka leads to an increase in the content of fusel oils, methyl alcohol and furfural. When buying vodka at the store, there is often doubt about the quality of the product. Currently, however, there are many ways to measure the quality of the drink, which will help to protect you from poisoning.
You will need
- - sulfuric acid;
- - litmus paper;
- - matches;
- - a glass.
Pour 30-50 grams of vodka into a glass, add exactly the same amount of sulfuric acid. If the mixture became black, then vodka dangerous to your health, it must immediately be poured.
Some forgers are adding sulfuric acid in a weak vodka to enhance the strength of the drink. To determine the quality of vodka you'll need a litmus test. Pour a small amount of vodka, which caused suspicion and put in it a litmus test. If the paper has become red, a vodka drink should not be, because it contains large amounts of acids hazardous to your health.
Carefully pour the vodka into a bottle cap and ignite. Good vodka 40 degrees will burn with a blue flame. If vodka is not lit or flashing on the contrary as gasoline - it is worth considering. This vodka is better not to drink.
Buying a bottle of vodka, shake it. If the bubbles are large, then vodka is highly diluted with water. If small bubbles rise up the snake, this indicates a good quality vodka.
Opening a bottle of vodka, try to inhale it, as they say, full chest. If you feel sharp unpleasant and does not smell of vodka – this vodka should be abandoned. Perhaps the vodka has a touch of acetone or made from industrial alcohol. So better not to risk your health.
There is another old method of checking the quality of vodka. Take a bottle of vodka and try to freeze it at -20 degrees. If the bottle has at least small pieces of ice – it is said that she diluted with water. Of course, this vodka is better not to use it.
Excessive alcohol consumption is dangerous for your health. Use only quality drinks and only in limited quantities.