#calibrationcurve

Maybe the Instrument Is No Longer Linear Enough to Be An "8000C"

Purpose: To explore the analytical variability of the 8000C as determined by the Alcohol Test Committee during evaluation of the 8000C...

BAC Analysis in a Lab Without Bracketing Controls is at Best Qualitative not Quantitative

We have a serious problems in the Canadian criminal justice system. One of them is the failure of Parliament and the Courts to recognize...

Change at One Point but Not at Another Point that is Equivalent

This is a sample excerpt from a cross-examination of a Crown expert using data from periodic inspection of an approved instrument. The...

Why Does the ATC Say Single Point Control Tests are Good Enough?

Purpose: To explore the differences between a measurement instrument that has a linear relationship between the thing measured and the...

Response Drifts Over Time

In an article relied upon by the SCC in St. Onge, Brian Hodgson stated: Defence lawyers need to educate themselves about the meanings of...

8000C Auto-Calibration Sequence - How to Run the Auto-Calibration Sequence

Purpose of this cross-examination: To educate the Court about the calibration sequence run on the approved instrument at the factory. To...

Traceability of Measurement Result on an Approved Instrument

Purpose: To obtain an admission from the CFS scientist that the traceability of a measurement result on an approved instrument or a truck...

Instrumental Deviations from Beer-Lambert Law

This blog entry explores the use of a university textbook during cross-examination of a CFS scientist on "Instrumental Deviations from...

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