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 Gold has been one of the most precious metals for over a million years. It is combined with other metals to make jewellery of different varieties. There are many ways to test the purity of gold. Since gold is a precious metal it is often found alloyed and mixed with other metals. So it is pertinent to test the purity of the metal. The gold testing machine is used mainly for this purpose. Ways to Test the Purity of Gold Different methods are adopted to test the purity of gold. Karat is the measurement used for measuring the purity of gold. Pure gold is usually known as 24 karat gold. Before the invention of gold testing machine, the purity of gold was tested using porcelain, glass and magnet. The use of porcelain to test the purity of the metal-gold included scratching the sample metal on unglazed porcelain, if the color of the streak is yellow, it is pure gold. Similarly the use of glass to check the purity of gold included scratching the sample metal on a piece of glass, since go...

 There are a wide range of water quality tests used to help determine how safe, or even drinkable, water is to be used in a household setting or otherwise that water test labs perform. These different types of tests help determine if specific materials of contaminants have infected a body of water, and help inform how it needs to be further treated. Here are just a few types of water testing methods. Bacteria Tests There are a range of potential bacterial contaminants that can plague water. One of the most common and most looked for is E. coli bacteria, which comes from fecal matter exposure and can result in serious health issues when consumed. Bacteria testing is essential in determining how safe water is to drink or expose to your skin. Mineral Tests The list of mineral water testing labs in Chennai available could be a thesis paper, for how many there are. A few common and important mineral tests include chlorine and chloride, nitrate and nitrite, lead, copper, iron, zinc, pot...

 More than 2/3 of the human body is made up of H2O. In fact, almost 95% of the human brain is comprised of H2O. Water is essential for healthy living, growth, and development. It is recommended to drink 8 cups of water or more every day. Do you drink your 8 cups of H2O a day or more? Have you thought about what else you may be drinking in your H2O besides the water? There is more and more evidence showing that well Water Testing Labs in Chennai is necessary because there are so many pollutants and contaminants in ground H2O. These pollutants, chemicals, and bacteria can come and grow from a variety of sources and actions. Regardless of what is causing the foreigners in your H2O, it is necessary to proceed with getting some H2O test strips or a company to test the H2O you and your family use for drinking, cooking and bathing. In the event that you use a water testing kit or strip kit, it is important to know that they are not going to test or show all harmful bacteria and contamina...