Part 2 of Our Alcohol Testing Series on what happens to blood and urine specimens that are sent to the State laboratory.
Meta Description: "Expert explanation of MBRS alcohol testing procedures in Ireland. Understanding laboratory methods, timeframes, and quality standards for drink driving tests."
MBRS Laboratory Testing Methods in Ireland
According to the Medical Bureau of Road Safety (MBRS), Ireland's National Forensic Laboratory, alcohol testing involves precise scientific methods and strict protocols.
This article explains the laboratory process and why it matters for drivers.
Official Specimen Collection Standards: How Specimens Are Analysed
The MBRS uses a sophisticated testing method called Headspace Gas Chromatography with Flame Ionisation Detection.
While this may sound complex, it's an advanced technology that ensures accurate and reliable results for both blood and urine samples.
"Can the alcohol in the specimen I gave increase before it’s tested?
No.
According to the Bureau there are several studies on the stability of alcohol in storage.
Over time, alcohol concentrations in specimens actually decreases rather than increases,
regardless of storage conditions"
The Collection Process
The MBRS carefully designs their specimen bottles for accurate testing:
Urine bottles contain sodium fluoride to preserve the sample
Blood bottles contain two special ingredients:
Sodium fluoride to preserve the sample
Potassium oxalate to prevent blood clotting
Laboratory Steps
When your specimen arrives at the MBRS:
It's registered in their computer system (LIMS)
Details from your Section 15 form are recorded
The specimen undergoes careful preparation
Testing begins using approved methods
Alcohol Testing Quality Control Measures
The MBRS maintains high standards through:
Regular independent audits
International accreditation (ISO 17025:2017)
Strict chain of custody procedures
Detailed documentation of all steps
Timeframes for Alcohol Test Results
The MBRS provides clear timelines:
Alcohol testing typically completes within 2 weeks
Results are sent by registered post
Additional testing may be needed in some cases
If the blood specimen is tested for drugs, a result won’t be known for 8-10 weeks.
Understanding MBRS Test Results
The MBRS issues detailed Certificates of Analysis that:
Show exact alcohol concentrations
Follow legal reporting requirements
Chain of Custody
The MBRS emphasizes the importance of maintaining specimen integrity:
Red seals must remain unbroken
All handling is documented
Any break in the chain invalidates results
Proper storage conditions are maintained
Why Accredited Testing Matters
The MBRS's accredited status means:
All testing follows international standards
Methods are scientifically validated
Staff receive specialized training
Equipment is regularly calibrated and checked
Getting Additional Information
If you need information about your results:
Results are available from your local Garda station
Copies can be requested from the MBRS with proper documentation
Independent testing can be arranged through accredited laboratories
Frequently Asked Questions
What happens to my specimen when it arrives at the MBRS?
Your specimen is registered in the Laboratory Information Management System, documented, and analysed following strict protocols established by the MBRS.
How long does alcohol testing take in Ireland?
According to the MBRS, alcohol testing is typically completed within 2 weeks from when they receive the specimen.
Can I get my own independent test done?
Yes, you have the right to request a specimen for independent testing. However, the MBRS emphasizes that you must not break the red seal on the container.
What happens if I miss the delivery of my results?
If you miss the registered post delivery, the results are forwarded to the Garda Station where you provided the specimen.
You'll need to contact the station to retrieve your certificate.
What's in the white powder in the specimen bottles?
For urine tests, it's sodium fluoride (a preservative). For blood tests, it's a mixture of sodium fluoride and potassium oxalate (preservative and anti-clotting agent).
What testing method does the MBRS use for alcohol analysis?
The MBRS uses Headspace Gas Chromatography with Flame Ionisation Detection, a sophisticated testing method that provides highly accurate results.
Why does the MBRS need accreditation?
Accreditation (ISO 17025:2017) ensures that testing follows international standards, uses validated methods, and is performed by trained staff with calibrated equipment.
What breaks the chain of custody?
Breaking the red seal on the specimen container invalidates the chain of custody. All handling must be documented, and proper storage conditions maintained.
Can blood samples clot before testing?
No, blood specimen bottles contain potassium oxalate specifically to prevent clotting, ensuring the sample remains suitable for testing.
The bottles also contain sodium fluoride which prevents microbial growth.
Can the alcohol in the specimen I gave increase before it’s tested?
No. According to the Bureau there are several international studies on the stability of alcohol in storage. The MBRS have also carried out their own research.
Over time, alcohol concentrations in specimens actually decreases rather than increases, regardless of storage conditions.
How do I know my test results are accurate?
The MBRS maintains strict quality control measures, including regular independent audits, equipment calibration, and adherence to international standards.
Note: This information comes directly from the Medical Bureau of Road Safety.
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