Calibration, qualification, and validation

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Analysis of Tetrahydrocannabinol (THC) and Carboxytetrahydrocannabinol (THCCOOH) in Surface Waters by SPME and GC/MS

Hopane Reference Standards for use as Petrochemical Biomarkers in Oil Field Remediation and Spill Analysis

We provide high-quality, relevant hopane reference standards to be used as biomarkers for petrochemical oil field remediation and spill analysis.

High-Performance Quantitative H-1 NMR

The signal ratio of two different protons can be measured with tremendous precision, which enables the generation of certified reference materials for use as qNMR standards.

Reference Standards for Analyzing Polyphenol Catechins

Enzymatic Method for Determining Branched Chain Amino Acids (BCAA Assay)

Assay protocol for the colorimetric detection of Branched Chain Amino Acids (BCAA) in biological samples using the alanine assay kit.

US EPA Method 8015 (modified): GC Analysis of Gasoline Range Organics (GRO) on SLB®-5ms, Direct Injection

-Xylene 1000 μg/mL; 1,2,4-Trimethylbenzene 1000 μg/mL

MET-Biodiesel Capillary GC Column

B100 biodiesel analysis of free glycerin & total glycerin by Gas Chromatography using the Supelco MET-Biodiesel capillary gc column for ASTM D6584 & EN 14105

Qualitative Thin Layer Chromatography Analysis Ginkgo

Qualitative Thin Layer Chromatography Analysis of Flavonoids and Quantification of Terpene Lactones in Ginkgo Biloba Extracts and Tablets

Antibody Drug Conjugate Mimic Enables LC-MS Method Development Without Risk

Here we show how LC and MS methods may be optimized using a non-toxic surrogate of the ADC, an “ADC-mimic”, that behaves very similarly to the Cys-linked ADC Adcetris (Seattle Genetics).

GC Analysis of a 37-Component FAME Mix on Omegawax®

This technical article will discuss GC Analysis of a 37-Component FAME Mix on Omegawax.

radiello® Diffusive Air Sampling Application - Volatile Organic Compounds (VOCs) Thermally Desorbed

Volatile organic compounds are trapped by adsorption and recovered by thermal desorption, analysis is performed by capillary gas chromatography and FID or MS detection.

Clinical Application of SPME: Analysis of VOCs in Exhaled Breath as Cancer Biomarkers

This report demonstrates the potential of solid phase microextraction as a clinical research tool for the extraction of VOCs associated with lung cancer from human breath.

LC-UV-MS Method Development for Antibody Drug Conjugates Using a Non-Toxic ADC-Mimic

SigmaMab Antibody Drug Conjugate Mimic, is a non-toxic drug mimic utilized as a standard for mass spectrometry and high performance liquid chromatography.

Acrylamide in Food

Acrylamide analysis has been a very hot topic since the chemical was identified in food in 2002 by researchers at the Swedish National Food Administration.

High-Performance Thin-Layer Chromatography: A Fast and Efficient Fingerprint Analysis Method for Medicinal Plants

In this article we present several HPTLC applications and analytical standards for ginsenosides.

Detection and Determination of Caffeine, Taurine and Arginine in Shampoos by HPTLC

The modern thin-layer chromatography (TLC) offers advantages also in the field of cosmetics to quickly and simultaneously analyze samples with densitometric detection.

Proficiency Testing Schedule

Study schedule dates (through 2016) for proficiency testing samples from RTC. Environmental LPTP portfolio includes samples for Drinking Water, Waste Water, Soil/Solids and Air studies.

Quick, Sensitive LC/MS/MS Analysis of Aflatoxins in Cannabis

Analyte recovery values from spiked cannabis extracts ranged from 102 to 127% with RSD below 12% for 3 replicates. Excellent recovery values were even observed for Aflatoxins B2 and G2 which were spiked at a low level of 6.1 ppb.

Solution with 17 Amino Acids as TraceCERT^® Certified Reference Material

Technical article on "Solution with 17 Amino Acids as TraceCERT® Certified Reference Material"

P-I-A-N-O Standards for Detailed Hydrocarbon Analyses

This is an article concerning P-I-A-N-O standards for detailed hydrocarbon analyses.

Quantification of Bitter Acids in Hops by Thin Layer Chromatography

HPTLC separation followed by UV detection of the bitter acid content in various hop samples.

HPLC Analysis of Water-Soluble Vitamins Using Titan C18 Column

The B vitamins are very hydrophilic, consequently a gradient with a low concentration of methanol and acidic mobile phase was used for elution under reversed-phase conditions.

Comparison of QuEChERS Products for the Extraction of Planar Pesticides from Spinach

Supel™ QuE Verde combines a novel carbon with zirconia coated silica (Z-Sep+) to provide an optimum balance between planar pesticide recovery and color removal.

Calculating Your Working Tolerance: A Guideline

Guideline to calculate your working tolerance - Certified Standard Solutions (CRM)

Extraction and Analysis of PAHs in Olive Oil using Molecularly Imprinted Polymer SPE and GC-MS

Analysis of Active Cannabis Compounds (Cannabinoids) in Edible Food Products: Gummy Bears and Brownies

Rapid potency testing of marijuana-infused edibles using LC/MS on a biphenyl stationary phase detected eleven cannabinoids.

Vitamin D epi-Metabolites Separated with HybridSPE-Phospholipid

This Sigma-Aldrich article continues to detail new methodology for the analysis of Vitamin D metabolites using HybridSPE-Phospholipid technology.

LC/MS/MS Analysis of Steroid Hormones in Plasma

The conversion of clinical methods to LC/MS/MS offers advantages; however, is accompanied by a few limitations, notably interference effects from the endogenous sample matrix.

Sildenafil Citrate Method (HPLC) following USP Monograph on Ascentis® Express C18 with UV detection

Sildenafil, sold under the brand name Viagra, among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension.

Analysis of Fipronil and Fipronil Sulfone in Eggs, Chicken Meat and Mayonnaise

A short abstract on a method using QuEChERS and GC/MS/MS for determination of fipronil & fipronil sulfone.

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