How accurate is GC MS drug testing?
Only if both portions of the divided specimen show up positive is it considered a positive result by the testing lab. The accuracy of the initial drug screen, the immunoassay test, ranges between 92% – 98%. The accuracy of the GC/MS confirmatory test is virtually 100% from a scientific standpoint.
What is a GC MS drug test?
Immunoassay and gas chromatography–mass spectrometry (GC-MS) have been commonly used in UDS. UDS based on mass spectrometry can simultaneously screen for hundreds of drugs and is considered the gold standard for comprehensive drug screening.
How much does GC MS analysis cost?
As a rough approximation metals analyses usually run between $25 and $75 per sample, and LC/MS/MS and GC/MS/MS analyses are typically between $100 and $200 per sample. For lipidomics, the cost for running a quantitative analysis (targeted analysis of known lipids) is $120 per sample.
How does chromatography test for drugs?
9 Depending on the specific test, chromatography uses a gas or liquid carrier medium to separate the urine sample’s compounds by their molecular interactions with the carrier medium (mainly by different polarities).
What is the purpose of GC MS?
GC/MS is a technique that can be used to separate volatile organic compounds (VOCs) and pesticides. Portable GC units can be used to detect pollutants in the air, and they are currently used for vapor intrusion investigations.
What is LC MS MS analysis?
Liquid Chromatography with tandem mass spectrometry (LC-MS-MS) is a powerful analytical technique that combines the separating power of liquid chromatography with the highly sensitive and selective mass analysis capability of triple quadrupole mass spectrometry.
How much do gas chromatography cost?
Typical Fees
| Analysis | Examples | Cost per Sample Boat or Injection |
|---|---|---|
| Gas Chromatography Compound Specific d13C of Organics | ||
| Compound Specific GCirMS for d13C of Liquid Samples | FAMES, sterols, petroleum saturates fraction | $40 |
| “ | “ | $25 |
| Gas Chromatography Compound Specific d13C of Gases and Light Hydrocarbons |