Physical distillation is still considered the reference method for distillation. Simulated distillation (simdist) by gas chromatography offers some significant advantages over the physical procedure, making this technique quite useful. Analysis by GC typically has the better precision, higher throughput, less hands-on time, and lower cost per sample. Also, Simdist requires considerably less sample to be run and can generally be considered the safer of the two techniques. Simdist is very suitable to characterize crude oils.

A new Application Note has been released describing a method for the determination of the presence of Phthalates in Printed Circuit Boards (PCB) in compliance with IEC 62321-8:2017 and ASTM D7823-20. This rapid screening method uses Pyrolysis/TD-GC-MS, effectively combining a simplified sample preparation with high precision. For a fast & simple method to analyzing Plasticizers in printed circuit boards, read our application note here...

The number of regular cannabis users in the world is estimated at 183 million people[1]. It is illegal to drive a vehicle whilst under the influence of cannabis. The active ingredient in cannabis is delta9-Tetrahydrocannabinol (Δ9-THC). Common side effects includes the feeling of euphoria, hallucinations, relaxation and even sedation...

Typically, natural gas is bought and sold on an energy basis; therefore, composition analysis is required to determine its heating value or BTU content, in addition to other properties such as specific gravity, compressibility, etc. The Gas Processors Association (GPA) has published methods for the analysis of natural gas and demethanized hydrocarbon liquid mixtures (Standards GPA 2261 and GPA 2177).

Natural gas analysis commonly involves the quantification of nitrogen, carbon dioxide and C1 through C5 hydrocarbons as individual components, while C6 and heavier hydrocarbons are combined and measured as a single peak (C6+). Extending the analysis to obtain the compositional breakdown of the C6+ group can provide valuable information, particularly for rich gas samples (those higher in heavier end components). The system described here is designed for the extended analysis of natural gas and natural gas liquids (gases liquefied under pressure) up to C16 or higher. It provides the requirements of GPA methods 2286 (gas) and 2186 (liquids)...

This configuration will provide results according to ASTM D8098. This test method covers the determination of hydrogen, oxygen, nitrogen, methane, carbon monoxide, and carbon dioxide in the parts per billion mole (nmol/mol) to parts per million mole (μmol/mol) range in C2 and C3 hydrocarbons.

The Scion Instruments Stainless Steel Flow Through Cell allows for high accuracy, reliable, at-line automated sampling of low viscosity liquid streams. The Flow Through Cell is a simple design, consisting of a septum nut, Merlin Microseal ™ (23 Gauge) and a stainless-steel flow cell with an attached inlet & outlet tube of 75cm x 1/16” x 1.0 mm ID stainless steel.

This method is for determining trace impurities in high-purity mixed xylenes by gas chromatography (GC). Specific trace impurities determined include non-aromatic hydrocarbons, benzene, toluene and individual C9 and C10 aromatic compounds. C10 or higher non-aromatics, if present, may interfere with the determination of benzene...

The American Standard, ASTM D 6584, is the standard test method commonly used for the quantitative determination of free and total glycerin content in Fatty Acid Methyl Esters (FAME), typically intended for pure biodiesel or as a blending component for domestic and diesel fuels. Total glycerol content is calculated from the results obtained. The method is suitable for FAME from rapeseed, sunflower and soybean oils*...

The purpose of the European Standard EN-14110 is to determine the methanol content of Fatty Acid Methyl Esters (FAME) intended for use as pure biodiesel or as a blending component for domestic heating fuels and diesel fuels. For this application note the analysis was conducted using the internal standard method which was appropriate for manual headspace analysis. The analysis can be automated using a headspace sampler...