Simultaneous Analysis of Alcohol Metabolites and Barbiturates by LC-MS/MS
This hydrolysis-free method for the simultaneous analysis of alcohol metabolites and barbiturates allows all target analytes to be reported from a single LC-MS/MS method.
Fast, 3.5 Minute Analysis of Psilocin and Psilocybin in Urine by LC-MS/MS
This application note details a fast, 3.5-minute LC-MS/MS method for quantitative analysis of psilocin and psilocybin in human urine.
A Peer-Reviewed Workflow for the Analysis of Cannabis-Infused Chocolates
At Restek, we understand that cannabis testing labs demand reliable information to help them make the right choices when developing robust methods capable of complying with stringent regulations. With this in mind, we developed a simple approach for the determination of pesticides, mycotoxins, and cannabinoids in chocolate samples.
Accelerate Inhalants of Abuse Method Development with Pro EZGC Software
Model more than 60 common inhalants of abuse and develop methods within minutes, without taking your instrument offline.
Improved Screening Method for Acylcarnitines and Amino Acids in Dried Blood Spots by LC-MS/MS
This method for acylcarnitines and amino acids using LC-MS/MS with a guard cartridge column provides the speed of flow injection methods with improved sensitivity and specificity.
Evaluation of Dispersive and Cartridge Solid Phase Extraction (SPE) Cleanups for Multiresidue Pesticides in QuEChERS Extracts of Finished Tobacco Using GCxGC-TOFMS
We compared the efficacy of dSPE and cSPE cleanup methods for multiresidue pesticide analysis of QuEChERS extracts of finished tobacco products using GCxGC-TOFMS. Cleanup with dSPE tubes containing 7.5 mg of GCB and 25 mg of PSA produced better results than other methods, with average recoveries of 92% and 91% for 500 ppb and 50 ppb fortifications respectively.
Analytical Method for Polycyclic Aromatic Hydrocarbons (PAHs) in Yerba Mate Tea Using Modified QuEChERS, Solid Phase Extraction and GC-TOFMS and GC-MS/MS
This application note describes the development of an analytical method for PAHs in tea that allows analysts to more quickly and accurately characterize target PAHs. Sample preparation is based on a modified QuEChERS extraction and solid phase extraction sample cleanup. Both GC-TOFMS and GC-MS/MS techniques were used and analyses were optimized for resolution of isobaric compounds, as well as for maintaining a reasonable analysis time.
Comparing Pesticide Residues in Amish and Commercially Grown Strawberries and Spinach Using QuEChERS, Various dSPE Sorbents, and GC-TOFMS
QuEChERS extraction, dSPE cleanup, and GC-TOFMS analysis were used to assess pesticide residue levels in strawberry and spinach from both commercial and Amish growers. Various dSPE sorbent products were compared to determine which were most effective.
High-Quality Analysis of Pesticides in Cannabis Using QuEChERS, Cartridge SPE Cleanup, and GCxGC-TOFMS
As medical marijuana is more frequently prescribed, patient safety must be ensured. Pesticide residue testing is an important part of assuring safe product is dispensed, but analysis can be extremely challenging due to matrix complexity. The use of QuEChERS, cartridge SPE cleanup, and GCxGC-TOFMS as presented here, produces high-quality quantitative data for this difficult analysis.
Characterizing All 136 Tetra- to Octachlorinated Dioxins and Furans
The Rtx-Dioxin2 column has a unique selectivity for dioxins and furans, including specificity for 2,3,7,8-TCDD and 2,3,7,8-TCDF. Here we characterize all 136 tetra- through octachlorine dioxins and furans and define all possible coelutions. While commonly used cyanopropyl columns are limited by a low maximum operating temperature of 240°C, the Rtx-Dioxin2 column is stable up to 340°C, extending column lifetime and improving the analyses of dioxins and furans.
