Application Notes: Food and Beverage

We look at the Zebron ZB-624plus, the optimal choice for the analysis of volatile compounds for environmental, pharmaceutical, food, cannabis, and specialty chemicals.

In this application, we look at the determination of residual solvents and terpenes in cannabis by GC–FID using the Zebron™ ZB-624plus™ GC column.

Incognito observes some unexpected emerging trends at Pittcon 2020.

Automated profiling of gin botanicals by HS-SPME Arrow-GCxGC-MSD/FID is demonstrated using the CTC PAL RTC, Agilent 7890B GC with reverse-flow modulator and 5977B MSD.

Mobile phase flow is critically important, and must be carefully controlled. In this instalment of “GC Connections”, we discuss carrier gas flow and its importance in successful gas chromatographic (GC) analysis. We will begin with a short review of fundamental theories showing why flow is important, and move into a discussion of how flow rate is measured and controlled on modern instruments. Finally, we will discuss the effect of flow-related parameters, including carrier gas choice, the difference between constant pressure and constant flow modes, and some new thinking about flow rate optimization. We conclude with some takeaways that should assist gas chromatographers with effective carrier gas management.

Pesticides are widely used to protect agricultural products from mould or insect infestation during growth, storage, and product transport. Intensive use or abuse of pesticides can cause environmental pollution in different areas. Lakes, rivers, and aquifers need to be monitored to protect drinking water. Concentration levels of pesticides down to low fg/μL range must therefore be quantified in organic solvent-based water extracts. Typically, large volume injections (LVI) are used to reach this concentration range.

Amylose is an occasionally branched biopolymer and, together with amylopectin, the hyper-branched component, a constituent of starch. Determination of branching in amylopectin, an important property affecting viscosity, stiffness, and thermo-mechanical performance, requires a fully linear amylose analogue. This application note describes how synthetic amyloses from enzymatic (phosphorolytic) reaction were checked for their linearity using size-exclusion chromatography-multi-angle light scattering (SEC-MALS).

This RAFA 2019 winner of the Best Poster Award, reviews the identification and characterization of secoiridoids isomers found in Greek extra virgin olive oil (EVOO).

The metabolites from an infection of the fungus, Aspergillus flavus in foods are known to be toxic to human life, infected food needs to be identified.

What you will learn: - Automated extraction method achieves higher recoveries - Steps involved in QuEChERs vs. EDGE method

A sensitive, robust method for analysis of glyphosate in wide range of foods using a simplified sample preparation procedure effective for challenging matrices

Fast and sensitive HPLC method with post-column derivatization for analyzing Fumonisins in grains and feeds at levels as low as 0.01 ug/g

A sensitive method for testing of active compounds in cannabis and cannabis-containing products.

A solution for amino acids analysis, these methods were optimized to comply with system suitability requirements of Pharmacopoeia 8.0 methods.

Highly sensitive analysis of aflatoxins and ochratoxin A to guarantee the safety of hemp crop and hemp-containing consumer products.

An easy and sensitive method to analyze Aflatoxins B1, B2, G1, G2 and Ochratoxin A in cannabis plant and edible products at levels below established by state regulations.

A sensitive HPLC method allows analyzing cannabinoids, including THC and CBD, in hemp and hemp-containing products to ensure compliance with the 2018 Farm Bill.

Common isoflavones and mycotoxins associated with Estrogen Receptor binding are separated into their individual components using reversed-phase liquid chromatography.

This application note demonstrated the correlation coefficient (R2) > 0.99 from 26 fragrance compounds analysed by a CDS Analytical dynamic headspace module with PAL.

-GC×GC offers dramatic improvements over traditional gas chromatography for the analysis of complex mixtures in numerous applications -The power and utility of GC×GC technology -The need for more advanced and novel stationary phases for gas-chromatographic columns

This study describes the separation of nanoplastics and determination of their surface charge by electrical asymmetrical flow field-flow fractionation.

This study describes the separation of nanoplastics and determination of their surface charge by electrical asymmetrical flow field-flow fractionation.