Archive for March, 2009

Blood Alcohol Tests: Collecting the Blood

Monday, March 23rd, 2009 Posted in Blood Test, Chemical Test | 1 Comment »

     The first step in the blood collection process is decontamination of the area where the blood will be drawn.  In clinical use a prepackaged 70% isopropyl alcohol pad is ... Read more..

Urine Testing: The Basics

Thursday, March 19th, 2009 Posted in Driving under the Influence of Drugs, Urine Test | No Comments »

     Urine samples are usually tested for drugs by using a screening test followed by gas chromatography-mass spectroscopy (GCMS).  The screening test is normally an enzymatic method of analysis that ... Read more..

Combined Influence of Alcohol and Drugs

Thursday, March 19th, 2009 Posted in Blood Test, Chemical Test, Driving under the Influence of Drugs | No Comments »

     We are seeing more arrests for DUI where the breath alcohol concentration is not consistent with the manifestations of impairment described in the arrest report or captured on video.  ... Read more..

Does the Breath Test Really Measure Deep Lung Air?

Wednesday, March 11th, 2009 Posted in Breath Tests, Chemical Test, Intox 5000 | No Comments »

     One of the assumptions upon which breath alcohol testing has rested since the 1950's is the belief that the instruments measure "deep lung" or alveolar air.  This outdated assumption ... Read more..

Alcohol is not Always Ethanol

Wednesday, March 11th, 2009 Posted in Breath Tests, Chemical Test, Intox 5000 | 1 Comment »

     Ethanol or ethyl alcohol contains two carbon atoms linked to hydrogen atoms (methyl groups) and one oxygen atom linked to a hydrogen atom (hydroxyl group).  Most infrared breath testing ... Read more..