Updated on 19 October, 2021
The most reliable Drinking Water Test can help you to inform you if your water is safe for food preparation or drinking. The most commonly tested for bacteriological contamination is total coliform count in drinking water samples. The faecal indicator test (typically tested for erythromycin-based thermotolerant bacteria or Escherichia coli) can indicate how healthy the water really is and whether or not the water is safe to drink. Other tests that may be performed include complete nucleic acid amplification (CNA) profile, gas analysis, and ultra violet light exposure.
There are a few forms of laboratory testing that may be performed in a laboratory. One of the most common forms of water testing is the pH detection test which is performed in a lab with the use of special pHometers. This test can determine if the water that we drink is balanced and safe for human consumption. In addition, laboratory testing can also detect specific types of bacteria that cause specific types of disease.
Another form of water testing is the analysis of microorganisms using growth media and associated techniques such as colony counting. To test for bacterial contamination, scientists commonly perform the colony counting method in which colonies of bacteria are marked and are then counted. In this process, a sample of water is placed into a Petri dish where millions of colonies of the bacteria grow. When the water sample changes in temperature, the concentration of the colonies increases indicating the presence of bacteria. However, the sample must be tested within a very specific time frame to ensure accuracy.
Chemical analysis is another form of testing that is used in order to analyze the water quality. Samples are typically analyzed using the principle of Chemical Analysis of Substances or CAS. For example, when testing for a particular element, such as Chromium, sample compounds are prepared from the natural elements that are present in seawater. Then, these sample compounds are subjected to various conditions such as oxidation, dehydration and heating and filtering before they are finally analyzed using a spectroscopic technique. This process is basically used in order to determine the amount of the element that is present in the water.
Another important laboratory testing technique used by several institutions is the Gas Chromatography/Mass Spectrometry (GCS/MS) method. The instrumentation required for this method is a gas chromatography/mass spectrometer and a spectrometer/gas chromatography tandem mass Spectrometer. The instrumentation for this type of water quality testing is relatively smaller than that used for the other types of laboratory testing. Some laboratories also perform gas sensors that use the concept of gas sensing in order to test the quality of water at a specific location.
Other important techniques that are being used include the concept of Thermo-Orient Fluids and Spectral Hydrodynamic Testing. These two techniques are generally used together in order to determine the chemical changes that take place in water quality as a result of changing temperatures. A hydrodynamic test is usually done on samples that are subject to changes in water temperature as a result of a weather condition. Meanwhile, a thermal analysis performs chemical tests based on the way in which different fluids behave when placed in specific containers.
The third type of water quality tests that are commonly performed are biological testing and chemical tests. These two types of testing play an important role in determining the occurrence of harmful microorganisms and their effects on aquatic systems. The first type of testing performed on aquatic systems involves the testing of biochemical oxygen demand. This includes testing for the presence of oxygen molecules in samples of water. The second type of testing involves testing for the presence of specific indicators of bacterial growth.
Chemical oxygen demand is often measured using closed-circuit TV spectrographs. The process involves exposing sample solutions to different concentrations of chlorine and other compounds. After which, they are measured for the amount of oxygen molecules that were produced. For bacterial growth testing, sample solutions are treated with specific concentrations of bactericidal and anti-bacterial chemicals. The latter may be either antibiotics or selective antibiotics that are formulated to kill specific types of organisms.