Food & Beverage Analysis
Automated Online µSPE Clean-up for QuEChERS Approach to Pesticides Analysis
Spotlight on the availability of automated µSPE (micro Solid Phase Extraction) on the Thermo Scientific™ TriPlus™ RSH Autosampler enabling professionals in modern laboratories to gain reliable, high throughput operations for GC-MS analysis of pesticides in a wide variety of food matrices, even those with high lipid contents.
Key benefits of replacing manual clean-up procedures with a fully automated on-line approach is the efficiency of the QuEChERS (quick, easy, cheap, effective, rugged, and safe) extraction while offering the benefits of eliminating human errors and scaling down sample volume and solvent consumption.
More benefits of automated online µSPE include: lower % RSDs and higher % recoveries compared with manual d-SPE, leading to more reliable quantitation of targets analytes; more efficient removal of matrix co-extractives for higher selectivity and sensitivity; improved robustness as demonstrated by %RSDs lower than 10% during the LC-MS/MS analysis of 200 consecutive injections of tea extracts; unattended operation and time savings compared to manual d-SPE; improved productivity with a decrease in system maintenance and increased instrument uptime; enabling excellent results even with entry-level triple quadrupole MS systems; unified clean-up operations for improved efficiency in routine testing laboratories.
Request for the latest application note titled ‘Multi-pesticide residues analyses of QuEChERS extracts using an automated online µSPE clean-up coupled to LC-MS/MS’. More information online:
ilmt.co/PL/2QPk
52264pr@reply-direct.com
New Reference Material for Sulphur Dioxide Analysis in Fruit Squash Announced
The UK’s National Measurement Laboratory (NML) at LGC has expanded its portfolio of reference materials to include a new material, LGC7113, which is a fruit squash characterised for sulphur dioxide (SO2) content, traceable to the SI (International System of Units).
Sulphur dioxide is a permitted additive used in the production of food and drink which acts as a preservative and antioxidant, and makes products last longer. Sulphur dioxide concentrations are limited to ensure food safety for the consumer; it is permitted in different concentrations depending upon the food type. This additive is regulated under European Regulation No 1333/2008, with a consolidated version from 28 October 2020.
The new Reference Material has a concentration of 255 ± 41 mg/L, prepared at a level similar to the regulatory limit for flavoured drink concentrates based on fruit juice or comminuted fruit (250 mg/ kg). The production of LGC7113 is within the scope of LGC’s ISO 17034:2016 accreditation. The material can be used by labs that carry out analysis on drink samples to evaluate their methodology and provide an on-going assessment of their measurement of sulphur dioxide concentration.
Despite the regulatory requirements there aren’t many reference materials or quality control materials like this on the market. The material produced by the Reference Materials team will address that need, helping laboratories carry out analysis in these kinds of beverages, and ultimately ensuring safer products for consumers.
More information online:
ilmt.co/PL/JO5M 54503pr@reply-direct.com
Reduce Ashing Times for Foods and Feeds
The ashing of foods and feeds is an important sample preparation process but can often take many hours causing a bottleneck in the laboratory workflow. Laboratories often do not know how long their ashing process takes as samples are left in the muffle oven overnight ready for analysis the next morning.
By using a microwave enhanced muffle system, ashing times can be reduced by up to 95% from hours to minutes using the same temperature profile and standard crucibles. For instance, the ashing of wheat flour in a traditional muffle furnace takes over 6 hours that can be reduced to 50 minutes in a microwave system.
The Milestone PYRO ashing system from Analytix offers additional benefits such as an integral exhaust system with no loss of heat to the laboratory and also removes odours from the laboratory including corrosive fumes from wet ashing that are neutralised with a scrubber system thereby eliminating exposure to the operator to toxic fumes.
Even temperature distribution across the muffle eliminates cold spots and ensures reproducible ashing across all crucibles. The system provides auto-calculation of the results through interfacing with an analytical balance and can additionally export the ashing profile in Excel or pdf format.
More information online:
ilmt.co/PL/Xax9 53433pr@reply-direct.com
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