Mass Spectroscopy for Lawyers Part 9: Other topics of interest in GC-MS

In a series of posts, we are going to talk about Mass Spectrometry.

In this post, I would just like to list all of our past posts in both Gas and Liquid Chromatography regardless of the method of sample introduction or method of detection. They are in no particular order. Please enjoy.

GC-MS is not perfect: The case study of methamphetamine
Why do I see two peaks on my EtOH analysis using HS-GC-FID?
What is the difference between HS-GC-FID and GC-MS?
Drugs of Abuse (DOA) analysis performed today in the US
Fool’s Gold or Real Gold? HS-GC-FID is it specific or selective or neither?
What is a Gas Chromatography column and why should I care?
The case for raw data: “Integration” in Gas Chromatography: How to make an innocent person guilty in a DUI case by manipulating the software
What’s Salt Got to Do With It? Salting Out Effect
Why forensic science testing for DUI BAC determination is the silly sister of analytical science: Good Laboratory Practice
A large problem in Gas Chromatography: No uniform standard for GC run position or composition
Crimping a Headspace Vial in Gas Chromatography: How not putting the “lid on the jar” can lead to disaster in a DUI case
Gas Chromatography and why is it is so important to Pennsylvania DUI arrests
Why saying the sample was run on a gas chromatograph is nearly meaningless
The Carry-over Effect: Lack of Blanks between tests leads to false positive or inflated BAC results
If he was an analytical chemist or a DUI defense attorney he would say “Show me the separation!!”
The variables of the Gas Chromatography process
In analytical chemistry for ETOH and Drugs of Abuse determination, it is very true that the matrix is all around us but truly is ignored
Personal bias is bad, but analytical bias spells disaster in DUI BAC and Drugs of Abuse testing
Carryover effect part Deux: Autodilution may be part of the problem for false blood results in DUI
Internal standard the likely culprit for inaccurate BAC results
Carryover effect part 3: Flushing of inert gas is not enough to prove there is no carryover
How do they make the squiggly lines turn into a magic number: Area under the peak
When tall and skinny is always beautiful? Fundamental principles of gas chromatography
Is it legitimate for a crime laboratory to use ‘historical data’ to prove its test results are valid?
The discretion exercised every day and with every test in forensic science
Why doesn’t your state crime laboratory use AMDIS?
False Conclusions and False Convictions: Attempts of Elucidating Pharmacodynamic Effect from an Analytical Chemistry Result-How Solely an Analytical Chemistry Result in a DUID Prosecution Cannot Scientifically Support a Conclusion of Driving Under the Influence of Drugs
What is a Gas Chromatography column and why should I care?
Exercise of Discretion: Sampling versus Sample Selection
CRMs: Reference materials and standards

Ed Lancaster says:

August 1, 2011 at 11:35 pm

Tim, I am not surprised at what I learned on your blog since it only one of the ways that “To protect and Serve” goes against the original intent. In Our area and I am sure that throughout the US there is the tow truck scam. Where I live, Kenner, La, (suburban New Orleans), the typical cost to have your car towed is about $75.00 no matter who you call. If the police have your car towed, and, (you are not given any options), the tow company, either Moon, or Rock and Roll charge you $300.00 and tow it only to their yard where you are charged $20.00 a day for storage. I know several people who have suffered this ripoff and I can’t get anyone to investigate it. The police will certainly not and the media won’t either. Keep up the good fight on your part.
Ed Lancaster.
504–250-2151