• Friday, August 22, 2014

EVERYDAY SCIENCE

DIY: Purity Checking

Dyuty Auronee
Salt

Lead in Lipstick:
Many women have a hard time accepting the fact that their cosmetics could contain traces of toxic substances. One of the worst is the 'lead' that can be found in many lipsticks.
Thankfully, you can easily test whether or not your lipstick contains lead. Coat the back of your hand or the underside of your wrist with the lipstick you intend to test. You can use a piece of fabric or paper instead. Rub a piece of copper, gold or silver across the lipstick stain. Gold, however, is the best metal to use. Take up any gold ring or earring and be sure to rub the metal in finely to get an accurate result. Also, wait a few minutes before reaching a conclusion.

Check if the lipstick's colour has changed, got darker or turned almost black. If the colour goes dark, it is likely that your lipstick contains at least trace amounts of lead.
Iodine in Salt:
Iodine, an important nutrient for the human body, is added to table salt to help prevent iodine deficiency in diet. Chances are high that the salt you intake says it is 'iodized' but you never know. By using some kitchen-friendly chemistry, you can easily find out which brands of salt have iodine added and which do not.
Put some salt on a white paper napkin. Squeeze a few drops of lemon juice on the salt. If the paper turns blue, iodine is present in the salt.
 

Honey

Additives in Honey:
Beware of what you are adding to your lemonade this summer and conduct any of these tests to verify the honey that comes with a label of '100 percent natural bee honey.' Try to dissolve a tablespoon of honey in water. If it is pure, the honey will stick together and sink as a solid lump to the bottom of the glass and if it is impure, it will dissolve in the water because the most common additive to honey is syrup of jaggery which dissolves easily.
Alternatively, pour a teaspoon of honey onto a blotting paper. Unlike the impure honey, pure honey will not be absorbed by the blotting paper. Also, you could pour a teaspoon of honey onto a piece of cloth and then wash the cloth. Pure honey will not leave any stain on the cloth.

 

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Published: 12:00 am Thursday, May 22, 2014

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