Nephelometry (medicine)
Nephelometry (medicine)
Nephelometry is a medical laboratory testing technique that is used to measure the concentration of proteins in a liquid by observing the amount of scattered light. It is a highly sensitive technique that can measure minute amounts of proteins that are otherwise difficult to detect.
Principle
The principle of nephelometry is based on the scattering of light. When a beam of light is passed through a liquid containing proteins, the proteins scatter the light in all directions. The scattered light is then measured at an angle to the incident light. The intensity of the scattered light is directly proportional to the concentration of the protein in the liquid.
Procedure
The procedure for nephelometry involves several steps. First, a sample of the liquid to be tested is placed in a cuvette. A beam of light is then passed through the cuvette and the amount of light scattered by the proteins in the liquid is measured. The intensity of the scattered light is then compared to a standard curve to determine the concentration of the protein in the liquid.
Applications
Nephelometry has a wide range of applications in medical laboratory testing. It is commonly used to measure the concentration of specific proteins in blood plasma, such as immunoglobulins and complement proteins. It is also used to detect and measure the concentration of antibodies in the blood, which can be useful in diagnosing and monitoring certain diseases.
Advantages and Disadvantages
One of the main advantages of nephelometry is its high sensitivity. It can detect and measure very small amounts of proteins, making it a valuable tool in medical laboratory testing. However, nephelometry also has some disadvantages. It requires specialized equipment and trained personnel to perform the test. In addition, the results can be affected by the presence of other substances in the liquid that can also scatter light.
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