Coupler BrakeForce Control Industries Inc. recently developed a double C-facecoupler brake that mounts on the drive end of a standard C-face motor,replacing the commonly used motor brakes mounted on the back ofa special motor designed with a mounting flange and extendedshaft on the fan end of the motor. Mounting the brake betweenthe reducer and motor allows a standard C-face motor to be used.Since many plants stock C-face motors for other applications, thiseliminates the purchasing and stocking of both a brake motorand a standard C-face motor, simplifying inventory andreducing costs. Applications include palletizers, packagingmachinery, baggage handling systems, concrete block manufacturing,cranes and more.Force Control Industries, 513.868.0900 • www.forcecontrol.comManaged Cleaning ProgramSpartan Chemical Company has announced therelease of Spartan HealthCheck, which uses a threeprongedapproach to ensure proper environmentalcleaning is achieved: training, validation and documentation.The training system educates staff on cleaning standardsand methods, and portable procedure cards providereinforcement as a framework for adherence to thestandard going forward. This process is supported by thecompany’s UVcheck ® validation tools. Hermetically sealedUV marker swabs and a portable black light allow managers to train and assess staff cleaningoperations. In combination with Spartan’s wide range of cleaning and disinfecting chemicals,the system provides an end-to-end solution for environmental cleaning for health.Spartan Chemical Company, 800.537.8990 • www.spartanchemical.comOzone WasherOzone Safe <strong>Food</strong> hasintroduced an ozone washingsystem, which uses nochemicals to wash harmfulbacteria, such as Escherichiacoli and Salmonella, from food.An environmentally friendlyapproach to disinfecting freshfruits and vegetables, thewasher uses ozonated water(aqueous ozone) to kill nearly100 strains of bacteria andviruses without the use ofharmful chemicals.Ozone Safe <strong>Food</strong>, 951.674.9222www.ozonesafefood.com“Big Six” E. coli StrainsATCC is now offering strains from each of the six non-O157 Shiga toxin-producing Escherichia coli (STEC) serotypesto the food safety community. The strains referredto as the “Big Six” have been linked to a growing number offoodborne illnesses, prompting the U.S. Department of Agricultureto add them to their test regimen. Routine verificationtesting for the presence of STEC serogroups O26, O45, O103,O111, O121 and O145 is required in raw beef manufacturingtrimmings and other raw ground beef components produceddomestically and imported.ATCC, 800.638.6597 • www.atcc.orgThermal Guard PackageThe Serco ® Thermal Guard Package, available on SercoVertical Storing Dock Levelers, provides the ultimate energyand security seal for climate-controlled loading docks. Thisadditional package allows truck doors to be opened frominside the building after the truck is positioned at the doorwithout breaking a thermal seal at the dock. It includes anenhanced hinged bottom draft pad, bumper covers and extendedbumper gussets to provide greater sealing capability.Serco, 800.933.4834 • www.sercocompany.comShelf-LifeEnhancerSterilex is now offeringPerQuat ® , a unique productspecifically designed for usein any type of clean-in-placesystem as an additional measurefor increasing shelf life,as well as producing a cleaner,safer product for consumers.Injection systems treatedwith the product keep foodsmelling fresher much longerand maintain normal colorand normal texture twiceas long as nontreated systems.Validated by a majorU.S. poultry processor, theseproducts were used to disinfectbrine injection systemsand needles, and were foundto lower both aerobic platecounts and total coliformcounts.Sterilex, 800.511.1659www.sterilex.comGlove LineAnsell has announced newadditions to its VersaTouch brand, a line of versatilehand protectionand apparel solutionsfor the food processingindustry.Featuring PolarBear® cut-resistanttechnology, the newgloves and the complementarycut-resistantsleeve raise the standardin worker safety and comfortfor food processors.Ansell, 732.345.5400www.ansell.com64 F o o d S a f e t y M a g a z i n e
Testing(continued from page 15)Figure 1: Chromatograms Obtained in Multiresidue Analyses of More than 300 PesticidesAnalyzed by GC-MS/MS and LC-MS/MSrange of compounds independent oftheir elemental composition and providesimultaneous quantitation and structuralidentification of detected analytes. It alsoadds another degree of separation/selectivityon top of chromatographic separations.These unique features have madeMS the number one choice for detectionand identification/confirmation of tracelevelorganic chemical contaminants inmodern testing laboratories.First, the combination of MS withgas chromatography (GC-MS) has becomepopular for the analysis of volatileand semivolatile compounds, includingmany pesticide residues, PAHs, PCBsand other less-polar POPs. More polar,thermolabile and less volatile analyteswere difficult to analyze until the morerecent introduction of atmosphericionization techniques, such as electrospray,for liquid chromatography-massspectrometry (LC-MS). LC-MS hasopened the door to the direct analysis ofmany more polar contaminants, includingmodern, new-generation pesticides,and the majority of veterinary drugsand toxins, such as mycotoxins. Manyof the emerging and recently identifiedcontaminants, including acrylamide,melamine or Sudan dyes, are analyzedpreferably by LC-MS.Thus, modern food contaminant testinglaboratories utilize both GC-MS andLC-MS to cover the wide polarity rangeof possible organic chemical contaminants.Tandem MS (MS/MS) is typicallyemployed to provide an increased selectivity(especially in LC-MS) that helpsfurther distinguish target compoundsfrom potential matrix interference.Figure 1 shows an example of chromatogramsobtained in a multiresidue analysisof more than 300 pesticides analyzedby GC-MS/MS and LC-MS/MS, demonstratingthe speed and selectivity ofstate-of-the-art instruments that enablethe simultaneous and highly sensitiveanalysis of many compounds.Identification of UnknownChemical Contaminants in <strong>Food</strong>Detection and identification ofunknown contaminants is not an easytask, especially if they are present at lowconcentration levels. It requires expertiseand a good analytical strategy that isbased on all gathered information aboutthe sample and potential sources of contamination.Any clues, such as changesin smell, taste or texture, as well as adescription of potential poisoning symptomsmay be important in this respect.Concurrent analysis of control (“good”)samples with suspect samples is often essentialto find differences and eliminatepotential false positives.If a certain compound or a group ofcompounds is suspected, then a targetedsample preparation and instrumentalmethod(s) can be employed (see “TheImportance of Moisture in SamplesPrior to Chemical Analyses,” p. 14).For a truly unknown analysis, differentextraction and separation approachesshould be used to isolate compoundswith a wide range of physicochemicalproperties (polarity, solubility, volatility,etc.). Nontargeted analysis should beperformed, such as MS with full-spectraacquisition. Statistical analysis of theacquired chromatographic and MS dataof contaminated and noncontaminatedsamples may help identify differencesand reduce the number of componentsthat have to be examined. The acquiredMS spectra of suspected contaminantscan be compared with MS spectral librariesand compound databases. In LC-MS,high-resolution/accurate-mass measurements,using time-of-flight (TOF) ororbitrap MS instruments, should beused for added selectivity. In addition,tandem MS should be employed to helpelucidate the structure of unknown contaminants.In the end, strong knowledgeand expertise in both analytical and foodchemistry are typically required to succeedin this task.Current and Future Trends inChemical Contaminant Analysis in<strong>Food</strong>The current and future trends in theanalysis of chemical contaminants areand will be strongly affected by developmentsin analytical instrumentation. Thespeed, sensitivity and selectivity of stateof-the-artMS instruments enable analysisof many compounds in one analyticalrun. Consequently, streamlined samplepreparation approaches, such as QuECh-ERS (Quick, Easy, Cheap, Effective, Ruggedand Safe), can be used that requireminimum extract cleanup without anypreconcentration steps—thus, they can beminiaturized and automated.The advancements in high-resolution/accurateMS instruments and developmentof related software tools showgreat potential to bring this technologyfrom the research environment into testinglaboratories, where it could be employedfor nontargeted testing of knownand unknown chemical contaminants. •Katerina Mastovska, Ph.D., is alead staff scientist at Covance Laboratories.She is actively involved inthe AOAC International as a co-chairof the AOAC Chemical Contaminantsand Residues in <strong>Food</strong> community.F e b r u a r y • M a r c h 2 0 1 3 65
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February/March 2013Vol. 19, No. 1FE
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Editor’s LetterWe at Food Safety
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USDA Seeks Comments on ProposedFroz
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TestingBy Katerina Mastovska, Ph.D.
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- Page 19 and 20: PROCESS CONTROL1. Scope2. Normative
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