What is the Marsh test?
Marsh test is a laboratory test developed in the 19th century to check the stop of arsenic in the sample. It is named for James Marsha, a chemist who developed it frustrated because the current testing of Arsen was not always as sensitive as it must have been. He also wanted to develop a method that would impress the juries with its reliability, which makes it easier to prove the involvement of arsenic in poisoning. In the 19th century it was so repeating that one of the nicknames of Arsenin was the "inheritance powder" that referred to its use in the murders of uncomfortable relatives. Deaths were often attributed to natural causes and in cases where the poisoning was suspected, arsenic could not always be identified. James Marsh decided to change it, and in this process he developed the test so effective that he directly contributed to the decrease in the frequency of arsenic poisoning.
Its test included a reacting sample from a zinc and acid case. This created a mixture of gases that could pass through the heated tube and leave the deposits behind. Labor could have been examined by examining depositsToric technician to determine whether Arsen was present in the original sample and at what concentration. The concentration was determined by comparing the results of the swamp test with photographs of the test results from the samples of known concentration.
A relatively simple swamp test could be used in court to show juries that Arsen was involved in death and to prove that the concentration of the poison was fatal. As a result, it was much more difficult to kill people with arsenic without fear of detection. Its test could also be used to check the cleanliness of the sample in other situations, such as concerns about food contaminated with arsenic. During the 19th century, many foods and medpodies were contaminated with poor practices of manipulation, lack of knowledge or substitution of components, which makes quality testing essential for safety.
It has been made over time some MARSH improvements, including the use of testing to confirm that the reactive LátKy and equipment were before testing without arsenic. This provided accurate test results without contamination. Further testing is available to check arsenic in modern laboratory facilities, but the marshy test is still used in the education of students and demonstrations of what is called "analytical chemistry of the generation of couples", a family related to the identification of individual components of known samples.