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11) Will a fuel cell based breath testing device respond to substances other than alcohol which are found on the human breath?
No. Fuel Cells will not respond to substances other than alcohol on the human breath after a 15 minute deprivation period.
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12) How do I find out if a particular instrument is approved for use?
You must read the procedures for testing and determine if they require any particular approval. In Law enforcement this information can be obtained from the regulating authority in that jursdiction. For DOT Workplace testing refer to the rule in the Federal Register.
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13) What is the difference between calibration checks (accuracy checks) and calibrations?
"Accuracy Checks also termed Calibration Checks are when a known sample is presented to the instrument for analysis and the result is compared against that known standard. If the instrument does not produce a result within the tolerances required by your testing program, the instrument must be calibrated. Calibration is the adjustment of the analytical system so that it will read a known standard properly."
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14) When do I need to calibrate my breath test instrument?
"Unless the rules for your program state otherwise, a calibration is only necessary when the instrument proves to be out of calibration on an accuracy check. "
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15) How accurate are Intoximeter EBTs?
"Our DOT approved evidential breath analyzers, if properly calibrated, meet and exceed the DOT requirements of producing results within the greater of plus or minus 5% or .005 of a known alcohol standard. "
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16) What units of measure are used to report alcohol concentrations in blood and breath?
"Many methods of expressing blood alcohol concentration are in use throughout the world. One jurisdiction may express a concentration of 80 milligrams (mg) of alcohol in 100 mLs of blood as 80mg%. Since 80 mg is 0.08 grams, 0.08 grams of alcohol in 100 mLs may be written as 0.08%. In other words, 80 mg% is equal to 0.08% which is equal to 80 mg/dL (deciliter = 100 mLs). This value can also be described as 0.08 BAC. To confuse matters further, in some jurisdictions in the US they express the result in terms of breath (i.e. .080 grams per 210 liters of breath or .080 BrAC. In the UK where they assume a 2300:1 partition ratio, they express the same concentration as 34.78 ug/100mL.) As you can see this can be confusing. Check with the Regulating Agency to determine what unit of measure is used in the jurisdiction that you are concerned with."
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17) Does CLIA regulate breath alcohol testing?
To date CLIA has taken the position that breath alcohol testing is not a diagnostic test and therefore is not covered by CLIA. See the attached letter under the More Info link below.
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