29 Food & Beverage Analysis Protecting Consumers with the Latest in Food Testing Technology
Contamination of food is a global problem, whether it is done intentionally for profi t or accidentally through negligence, the end result is the same - consumers pay the price.
The problem of food contamination can be addressed with complex analytical laboratory techniques such as GC-MS and HPLC, but time, skill, and cost requirements limit their usage to the confi nes of well-equipped laboratories. Surface Enhanced Raman Scattering (SERS) - an extension of Raman spectroscopy - permits detection and identifi cation of analytes in concentrations as low as parts per billion. Food analysis with SERS can be fast, convenient, and inexpensive.
SERS utilises nanotechnology with Raman spectroscopy to enable trace detection of adsorbed molecules. When a sample is applied to Metrohm’s SERS material, the nanostructures generate millions of times enhancement to Raman scattering, and detection of trace-levels of analytes is readily achievable. SERS is an extremely attractive technique as it retains all of the appealing features of Raman - portable equipment, multi-analyte detection capabilities, and rapid analysis.
Misa from Metrohm is a dedicated instrument for performing SERS measurements. Misa was developed with the focus for a simple, effi cient and green testing solution to address food safety threats. Easily swappable attachments allows fl exibility of testing using different types of SERS materials. Metrohm also provides targeted ID Kits that include test materials as well as detailed step-by- step instructions for measurement of common contaminants in various food matrices.
More information online:
ilmt.co/PL/ap1m 54452pr@reply-direct.com
Overcoming Diffi culties in Ion Measurement
A free White Paper from Metrohm presents a comprehensive overview of ion measurement by the use of ion-selective electrodes. The White Paper describes best practice for ion-selective measurements by both standard addition and direct measurement and provides a checklist helping users to ensure correct and reproducible results for target ions in foodstuffs, soil, environmental waters and other matrices.
Ion measurement is an established method to quantify the presence of specifi c ions in matrices of all kinds and composition. While ion measurement can be conducted in several different ways, e.g., ion chromatography (IC), inductively coupled plasma optical emission spectrometry (ICP-OES), or atom absorption spectroscopy (AAS), ion measurement utilising an ion-selective electrode (ISE) is a robust, much less expensive alternative to the sophisticated techniques mentioned before.
Topics addressed by the White Paper: the science behind ion measurement using ion- selective electrodes; electrode conditioning and adjustment of the total ionic strength for various target ions (Fluoride, Potassium, Sodium, Ammonium); when to prefer standard addition and when to prefer direct measurement (measuring modes); the advantages and disadvantages of the two measuring modes; proper cleaning and storage of ion-selective electrodes.
More information online:
ilmt.co/PL/PaeO 54453pr@reply-direct.com
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