Birch-Bessey-Lowry Method

Birch-Bessey-Lowry method: description and application

The Burch-Beesey-Lowry method, also known as the deterministic sampling method, is a widely used method for determining the carbon and nitrogen content of organic materials. This method was developed in 1952 by N. V. Burch, O. A. Beesey and O. N. Lowry and has since become a standard method in many laboratories for the analysis of organic materials .

The basic principle of the method is to determine the carbon and nitrogen content of a sample by combustion of the sample in oxygen and subsequent determination of the resulting carbon dioxide and nitrogen oxide. The determination of carbon dioxide is carried out by absorbing gas in a barite solution, and nitrogen oxide is determined by absorbing it in a solution of sulfanilamide acid.

The advantage of this method is its accuracy and ease of application. However, it also has some disadvantages, such as the length of the analysis and the need to use a large number of reagents.

The Birch-Bessey-Lowry method is widely used in the analysis of soils, coal, oil, food products and other organic materials. In particular, it is used to determine the qualitative and quantitative composition of soil organic matter, which is an important indicator of soil condition and fertility.

Thus, the Birch-Bessey-Lowry method is a reliable and widely used method for determining the carbon and nitrogen content of organic materials. Its use allows obtaining accurate analytical results, making it an indispensable tool for many scientific research and practical applications.

Birch-Bessie-Lowry method/Berchebessilourimethod Berch Bessey Lowry method (Berchakbsessel Lowry metend Berch Bilia Laury Metis - a method named after its authors and used in forensic medicine to determine the time of death of a person. It is one of the variants of the Ritter-Kurshman method Moulton. (veneratio Bessey Lowrie method) The method allows you to find out how long ago death occurred from the decomposition of the body. In the process of this process, many microorganisms and fungal spores die. In this case, a putrefactive change occurs in the tissues of organs and entire corpses, gases are formed, the presence of carboxyhemoglobin is revealed, changing the color of the "sample" from red to black. The method is advisable to use in case of iatrogenic death. It helps to correctly determine the quantity and quality of poisons, which, of course, helps justice. For this trial, accurate research results are needed.