Extremely reliable in detecting the presence of alcohol. Rather less so in determining where the alcohol came from. However, with proper pre-exam observation, it's about 100% accurate in determining if you've been drinking.
Blood alcohol level is determined using blood, breath, urine, or saliva tests. Most law enforcement agencies use the breath testing method to determine blood alcohol level.
BAL stands for "Blood alcohol content", so the most basic answer to this question is that it is a test that tests for the content of alcohol in your blood. The units in which it gives the result of this test is usually in percentage of the blood that is alcohol at the time of the test. The most common way of testing for the BAC of somebody is a breathalyzer, which is most often used by police who are testing to see if a driver is over the legal limit of BAC, which is .08 if you are over 21 in most states in the U.S.
DNA paternity test is the most accurate testing . It has accuracy approximately 99.9 %
Ultrasonic bone density testing
Blood grouping and tissue typing has been around for 40 years or more so in 1990 it was as accurate as now. The thing is it tells you who cannot be the father, not who IS. If it is between two men and one CANNOT be the father it has to be the other one. DNA testing is more accurate especially if the two putative fathers are related.
The most commonly used anticoagulant for blood tests is ethylenediaminetetraacetic acid (EDTA). It works by binding to calcium ions and preventing blood from clotting. This allows for accurate testing of blood samples without clot formation.
Assuming you mean Blood Alcohol Content (BAC) the court (or police department) has two main ways. The first is the breathalyzer test, which involves blowing into a tube while a computer analyzes the amount of alcohol on your breath. The second (and most accurate) method is through a blood test where the actual BAC is measured by using blood taken from your body.
The most accurate testing for Leukemia is by the patient having a Bone Marrow Biopsy. Leukemia is a general name for up to 77 different diseases (cancer) of the blood and/or blood producing organs.
Short answer: it stays longer than it would when a person is alive, but determining the amount and the source is difficult because of contamination and the fact that alcohol is a by-product of decomposition in most kinds of tissue. Accurate measurement of blood alcohol in cadavers is difficult, and gives widely varying results depending on cause of death, trauma, and other factors. If it is obtained from venous blood immediately after death, it is fairly accurate. In the case of cadavers, the preferred method is testing alcohol content of the vitreous humor (VH) in the eye. (Hey, you asked....) Although this seems to work well when gas chromatography analysis is used, a legally-accepted correlation between VH alcohol content and blood alcohol content v. time of death has yet to be established.
Ultrasonic bone density testing
The most common testing method for alcohol is a Breathalyzer.
5 in blood