Water or H2O as many manuscripts refer to it, is the essence of life. We all know that. Without water there wouldn’t be life in this planet.
Water may come in different forms and shapes. It may come as solid, liquid or as vapour.
It covers 71% of earth’s surfaces and is essential for sustaining life on it. An amazing fact that few may know is that 60% of the human body is made up of water.
Water at its purest form is rain water at the time it is vaporised by the sun. Coming down on earth though, it brings down impurities and particles present in the atmosphere and loses that initial purity.
The process by which we purify water is called water purification.
It removes undesirable chemicals, biological contaminants, suspended solids and gases from water. This leads to either ultrapure water or purified water.
The purity of water is usually assessed with the measurement of its conductivity. Hydrogen and Oxygen the main elements of water do not conduct electricity, while almost all other elements do, so by measuring the conductivity of water would be a good estimation of the purity of water. That can be done fairly easy with the use of a conventional conductivity meter.
The most accurate way of measuring water purity though, would be by estimation of another variable, that of Total Dissolved Solids (TDS). This value in a few words describes all the organic and inorganing substances present in water apart from oxygen and hydrogen.
The best method of measuring TDS would be by evaporating a water sample and weighing the residue using a precision analytical scale. As this is ineffective though and expensive to bout, conventional TDS meters are used where they give a rough estimation of the TDS value (in essence this is a meausrement of conductivity once again so usually you would find the TDS value is linked to that of the conductivity as it measures the quantiy of mobile charged ions while conductivity gives results in μS/m).
Purified water is used in a variety of applications. It is used widely in the pharmaceutical industry for preparation of chemicals and pharmaceutical products, in the brewing industry for preparation of their beverages, autoclaves, automotive use and even preparation of baby food among many other uses.
Technology has advanced a lot in the last century and purified water nowadays is easy to find in shops at very cheap prices and is used widely in the world. Even though it can’t replace drinking water that has the appropriate nutrients for our bodies, it is vital in many of our daily applications that need water and has become an essential element in a fluent progression towards the future.