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forensic toxicology Tag

Dayton DUI Attorney Charles Rowland > Posts tagged "forensic toxicology"
17 July
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DUI Blood Tests: Whole Blood vs. Serum/Plasma

Posted by Dayton DUI
in DUI Process

Ohio Administrative Code 3701-53-03(A) sets forth the techniques and methods for determining the concentration of alcohol in blood, urine and other bodily substances.  Pursuant to that rule, Ohio allows for testing including gas chromatography and enzyme assays.  To challenge a blood test, it is important to know if the State has tested the blood as whole blood or as serum/plasma.  Operation with a concentration of alcohol is prohibited if the concentration in whole blood is equal to or exceeds .08%, R.C. 4511.19(A)(1)(b).  However, the prohibited concentration for whole blood is a concentration equal to or exceeding .096%, R.C.4511.19(A)(1)(c).  The high...

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23 March
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DUI Blood & Urine Testing: Understanding Gas Chromatography

Posted by Dayton DUI
in DUI Process

If you have been arrested for a DUI involving blood testing you may encounter a testing procedure known as Gas Chromatography.  Gas Chromatography is the most reliable method for alcohol testing in blood and urine and has become the accepted gold standard in forensic toxicology.  Gas chromatography specificity for ethanol (drinking alcohol) is very good and this method can also identify and quantify other organic or interfering substances such as methanol and isopropanol. The two commonly used techniques for analyzing the gases are "direct injection" and "headspace analysis."  The devise works by utilizing a flow-through tube known as the column. ...

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25 September
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Blood, Breath & Urine Testing In Ohio: The Three Hour Rule

Posted by Dayton DUI
in DUI Process

Help your attorney defend your case by creating a credible time-line of events. R.C. 4511.19(D) sets forth a three-hour time limitation for the collection of bodily substances for alcohol and/or drug testing.  This rule is a change from Ohio's previous law which gave the State only two hours in which to obtain a sample.  The time requirement has been adopted by the Ohio Supreme Court in Cincinnati v. Sand, 43 Ohio St.2d 79, 330 N.E.2d 908 (1975) and more definitively at Newark v. Lucas, 40 Ohio St.3d 100, 532 N.E.2d 130 (1988),  where the court held that tests in test cases (cases involving a violation of...

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21 June
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Urine Tests Produce Too Many False Positives

Posted by Dayton DUI
in DUI Process

The EtG test is a biomarker test that detects the presence of ethyl glucuronide in urine samples. Usually, it is used to monitor alcohol consumption in individuals who are legally prohibited from drinking alcohol by the justice system or restricted from drinking by their employers. (Source)  The EtG urine alcohol test has come under criticism because it is so sensitive that "it can give positive results for merely coming in contact with common household products that contain alcohol, such as aftershave and mouthwash." The Role of Biomarkers in the Treatment of...

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