Application Notes

Application notes are produced by LTG members, or its corporate or associate sponsors, for the purpose of public education in analytical toxicology.
To read/download an application note, please click on its title (.pdf format).


Application Solutions for Forensic Toxicology

Battling the proliferation of drugs is not easy. Identifying them can be.

As new forms of “designer” drugs threaten public safety, there is an immediate need for advanced ways to classify these complex compounds. When it comes to sensitivity, reproducibility and ease-of-use, nothing outperforms Waters LC-MS based Toxicology Screening Application Solutions. To solve any drug analysis challenge that comes your way—with more confidence in your findings—see why Waters solutions are all the rage.

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Solutions that meet your demands for forensics & toxicology

Agilent Technologies has combined all of their general forensic-related application notes and methods into a single 793-page document, complete with an index and searchable text. The material is divided into four categories: Criminalistics, DNA, Doping, and Toxicology. Some sample content is listed below.

Criminalistics

  • Analysis of Gunshot Residue by ICP-MS
  • Methods for the Forensic Analysis of Adhesive Tape Samples by LA-ICP-MS
  • Analysis of Forensic Glass Samples by Laser Ablation ICP-MS

DNA

  • Using the 2100 Bioanalyzer to Optimize the PCR Amplification of Mitochondrial DNA Sequences

Doping

  • Development of a Screening Analysis by LC Time-Of-Flight MS for Drugs of Abuse
  • Methods for SAMHSA Compliant Workplace Urine Drug Testing

Toxicology

  • Analysis of Basic Drugs in Postmortem Blood by HPLC with Diode Array Detection
  • Detection of Cannabinoids in Oral Fluid Using Inert Source GC/MS
  • Rapid and Robust Detection of THC and Its Metabolites in Blood
  • Rapid, Robust and Sensitive Detection of 11-nor-Delta9-Tetrahydrocannabinol-9-Carboxylic Acid in Hair

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13C Labelled internal standards(IS) are superior to deuterated standards in UPLC-MS/MS analyses of drugs

Reversed phase LC-MS/MS is commonly used for qualitative and quantitative detections of drugs in human biological samples. Stable isotope labelled internal standards (SIL ISs) are often used to ensure these detections. Ideally an SIL IS behaves identically as its corresponding analyte during sample preparation and LC-MS/MS analysis.

SIL ISs used for drug analysis are usually deuterium (2H) labelled. However, 2H labelled ISs and their corresponding analytes are not always co-eluting, which in turn reduces the IS`s ability to correct for ion suppression effects. There is a greater difference in physical- chemical properties between H isotopes than between isotopes of other elements. 13C-labelled ISs are more similar to their corresponding analytes than 2H labelled ISs and therefore expected to behave more similarly during LC-MS/MS analysis.

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Rxi®-5Sil MS Columns... Assured Performance for Forensic Applications

Whether analyzing post-mortem samples or supporting athletic or workplace drug testing, toxicology labs are challenged with producing critical evidence that stands up under scrutiny. Increased pressure for fast, definitive results is driving labs to investigate standardized procedures and certifications aimed at reducing variability. GC column choice plays a vital role in data quality and using rugged, versatile Rxi®-5Sil MS capillary columns is an easy way to improve chromatography performance and simplify lab operations.

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New Rtx®-BAC Plus 1 and Rtx®-BAC Plus 2 Columns Advanced Technology for Fast, Reliable Measurement of Alcohol in Blood

Getting accurate, reliable results quickly is critical for labs analyzing blood alcohol concentration (BAC). New Rtx®-BAC Plus 1 and Rtx®-BAC Plus 2 columns provide definitive data in a fast, 2-minute analysis, so you can be certain of your results and maximize sample throughput.
Blood alcohol content is often determined using headspace injection and dual column GC-FID analysis. While this is a relatively straightforward procedure, column choice plays a major role in data quality and reliability. In order to produce accurate results, the primary and confirmation columns must fully separate target analytes from all interferences and produce symmetrical peaks. Due to deficiencies in selectivity and inertness, coelution and tailing peaks are observed on competitor columns, which make confident reporting of target alcohols difficult.

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Extraction of 45 Multi Class Drugs of Abuse from Hydrolyzed Urine Using ISOLUTE® SLE+ prior to LC-MS/MS Analysis

The method described in this application note achieves high reproducible recoveries for a wide range of drugs of abuse and metabolites from hydrolyzed urine. Hydrolyzed urine was extracted using the ISOLUTE SLE+ 200 supported liquid extraction plate and 1 mL column formats using 100 and 500 μL sample volumes, respectively. Sub ng/mL levels were achieved for all analytes using 100 μL of urine on the fixed well plate format.

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Extraction of 45 Multi Class Drugs of Abuse from Urine (Non-Hydrolyzed) Using ISOLUTE® SLE+ prior to LC-MS/MS Analysis

The method described in this application achieves high reproducible recoveries for a wide range of drugs of abuse and metabolites from non-hydrolyzed urine. Urine was extracted using the ISOLUTE SLE+ 200 fixed well plate and 1 mL column formats using 100 and 500 μL sample volumes, respectively. Sub ng/mL levels were achieved for all analytes using 100 μL of urine on the fixed well plate format.

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Extraction of a Range of Opiates and Metabolites From Human Urine Using ISOLUTE® SLE+ Columns prior to GC-MS Analysis

This application note describes the supported liquid extraction clean-up of a wide range of opiates and metabolites from urine prior to quantitative GC-MS analysis.
This application note demonstrates an effective and efficient supported liquid extraction protocol for the clean-up and concentration of a range of forensically significant opiates and their metabolites.
Analyte recoveries achieved using this method ranged from 70-99% with RSDs below 5% for all analytes.

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Extraction of Cocaine and Metabolites From Urine Using ISOLUTE SLE+ prior to LC-MS/MS Analysis

This application note describes the extraction of cocaine and a full range of cocaine metabolites from human urine prior to analysis and quantitation by LC-MS/MS.
This application note describes effective and efficient ISOLUTE SLE+ protocols optimized for sample (urine) volumes of either 200 μL or 1 mL. Procedures for high throughput (96-well plate) and column format are included.
The simple sample preparation procedure delivers clean extracts and analyte recoveries of 67-100% with RSDs of <5% for all analytes. Sub ng/mL LOQs can be achieved.

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Extraction of Synthetic Cannabinoids (SPICE) and Metabolites from Urine, Plasma and Whole Blood using ISOLUTE® SLE+ Prior to LC-MS/MS Analysis

This application note describes the extraction and quantitation of Cannabimimetic Naphthoylindoles (Synthetic Cannabinoids) and their metabolites (JWH Series) from various matrices using Supported Liquid Extraction (SLE).
Synthetic Cannabinoids or SPICE as they are commonly known have become an increasing problem as one of the newest forms of illicit drugs being consumed today. These compounds bind to the cannabinoid receptors in mammals triggering similar euphoric symptoms as Tetrahydrocannabinoids (THC). Currently robust and fast analytical methods of analysis are required to aid in the screening and detection of this growing class of compounds. The recoveries obtained for the synthetic cannabinoids parent and metabolites ranged from 70-98 %.

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Extraction of Bath Salts (substituted cathinones) From Human Urine Using ISOLUTE® SLE+ Columns prior to GC-MS Analysis

This application note describes the supported liquid extraction clean-up of a range of substituted cathinones from urine prior to quantitative GC-MS analysis.
"Bath salts" is the street name for a family of designer drugs chemically similar to cathinones that give the user similar effects to amphetamines. The abuse of these drugs is on the increase and regulation against their use and supply has now been implemented in the EU and North America.
Analyte recoveries achieved using this method to extract bath salts from urine ranged from 87-99% with RSDs below 10% for all analytes.

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