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A New Approach for Sample Adsorption and Extraction of Volatile and Semi-Volatile Components in Food Analysis


MonoTrap™ is a state-of-the-art tool for the extraction and analysis of volatile and semi-volatile components by MMSE (Monolithic Material Sorption Extraction). MMSE using MonoTrap offers a number of key advantages over alternative methods for adsorption and extraction (eg SBSE, SPME). Conventional media for sampling generally exhibit low surface area and thin polymer coatings, which may lead to poor recovery and the need for prolonged extraction times. Based on state-of-the-art silica monolith technology, MonoTrap has a large surface area due to the pores within the silica skeleton, whilst the through-pores reduce the resistance to flow. The result is a medium that requires no pre-conditioning, exhibits fast adsorption and extraction and offers complete desorption with ease.


These advantages have demonstrated excellent benefits in food analysis and many other areas. A range of applications has been identified including the analysis of red wine, coffee, tea, mango juice, curry powder, bread, mushroom fragrance, soy sauce, sesame oil, fresh and spoiled cabbage, seaweed, cigarettes, maple syrup and others. Copies of all application notes are available on request from Hichrom Ltd at technical@hichrom.co.uk. Sample adsorption with MonoTrap has been demonstrated to work using headspace sampling, direct contact sampling and passive sampling techniques. Sample extraction can be achieved using either solvent extraction or thermal desorption. Please contact Hichrom Ltd for further information on MonoTrap.


Inert Pipette Tips Critical to Safe Food Manufacturing


For food manufacturers, clean equipment is vital to safe food production. To address manufacturers’ concerns about labware safety, Mettler Toledo has introduced Rainin BioCleanTM pipette tips. These 100% inert tips help ensure safer ingredients, critical to product safety and consistency. This in turn helps to reduce costs associated with reworked batches and unhappy customers, ensuring compliance with increasingly stringent food manufacturing guidelines worldwide.


Many products on the market are labelled 100% contaminant-free or sterile. However, research shows that even these tips may compromise the outcome of scientific work because of the presence of substances commonly used in pipette tip manufacturing, such as the detergent DiHEMDA and releasing agent oleamide. BioCleanTM tips have been proven to be free of both of these substances.


BioCleanTM tips are also produced and packaged in a 100,000k clean room environment via a fully automated process, which ensures they are free of external contaminants such as DNA, DNase, RNase, ATP, Pyrogens, PCR Inhibitors. This absence of contaminants augments their non-reactivity—as well as the safety, consistency and palatability of end-result food products.


MORE INFO. 534


MORE INFO. 533


ADVERTORIAL


New Pro-Juice Refractometer Enables Confident Quality Assurance and Control Testing of Orange Juice


For many years, beverage manufacturers have adopted digital refractometers as their primary instrument for measuring the final dilution ratio (°Brix) of re-constituted fruit juice not only to assure product quality but also in an attempt to reduce losses by tightly controlling concentrate yields. For most fruit types this has been successful but for one of the most commonly produced juices, the high accuracy measurement achieved by latest technology digital refractometers has unmasked an erratic behaviour within an orange juice sample that prevents tighter dilution control, which in turn negates any opportunity of cost reduction by way of lowering target values without the risk of compromising minimum specifications defined by regulation.


REFRACTOMETERS AND


POLARIMETERS


has been working alongside a major fruit juice producer in order to develop an instrument that can achieve the same high accuracy results for orange juice samples as it can for other fruit based juices.


Over the past two years, leading refractometer manufacturer and xylem company Bellingham + Stanley®


By focusing on the practical handling of the sample prior to high accuracy measurement, Bellingham + Stanley has designed the Pro-Juice Refractometer based on the world leading RFM340+ refractometer to offer a measurement accuracy of 0.01 °Brix for sucrose solutions and more importantly, a reproducibility of 0.02 °Brix between orange juice samples, regardless of temperature deviation or operator skill level.


The Pro-Juice Refractometer was previewed at Brau Beviale in November 2011 and has featured at Pittcon and IFT Food Expo in the United States as well as Analytica, Achema and the Soft Drinks International Conference in Europe during the first part of 2012.


MORE INFO. 535


sales.bs.uk@xyleminc.com Phone: +44 (0) 1892 500400


www.bellinghamandstanley.com MORE INFO. 536


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