🧪 Forensic
in Edta Testing
50 ppm EDTA standard chromatograms, February 22 — morning and afternoon runs (Defense 1262-A, 1262-B)
Chromatograms of 50 parts per million EDTA reference standards run twice on February 22: at 9:32 AM (discovery page 4077, ion count approximately 319,561; Defense 1262-A) and at 1:48 PM (discovery page 4070, ion count approximately 49,393; Defense 1262-B). Introduced to demonstrate dramatic within-day instrument variability in the FBI controls, undercutting the reliability of Martz's quantitative conclusions.
Exhibit labels
How this item was marked across the four trials. The same physical item often gets different numbers in the criminal and civil trials.
Defense 1262-ADefense 1262-BDefense 1262-A/B
Source proceedings (2)
Every proceeding where this item was discussed. Click through to the transcript.