ResourceSeparations

Milk Adulteration with Melamine – Screening, Testing and Real-Time Detection

30 Sept 2013

This case study highlights where testing, screening and RTD have been used to measure melamine content in milk. Traditional testing methods LC/MS and GC/MS, NIR Screening methods, and real-time detection via DSA-TOF/MS are described.

Clarus 680 GC

PerkinElmer

The Clarus® 680 GC is designed for fast-paced, high-volume laboratories that require fast analytical cycle times. It maximizes throughput with the fastest injection-to-injection time of any conventional gas chromatograph. The Clarus 680 GC incorporates many other PerkinElmer innovations that provide unprecedented operational simplicity and outstanding flexibility while removing the barriers to productivity that can arise with more demanding samples and applications. The fastest temperature programmable inlets available combined with programmable pneumatic control (PPC) provides simple and straightforward solutions to complex analyses such as analysis for methanol in crude oil or determination of pesticides in food. Its near-ambient performances make the Clarus 680 GC the instrument of choice for the separation of light volatile components or when Large Volume Injection is required to run high-sensitivity GC/MS applications. Complete instrument control is available through TotalChrom and TurboMass as well as Waters® Empower™ 2 and Agilent® EZChrom Elite™ drivers. Features/Benefits Patented high-performance oven - the unique oven design of the Clarus 680 GC provides the fastest available heat-up and cool-down rate, enabling shorter injection-to-injection and analytical cycle times, maximizing your sample throughput and achieve maximum return on your investment •  Its twin-walled oven design with concentric air exhaust* allows the user to achieve greater separation at near-ambient temperatures without the use of special coolants, especially important for the analysis of Volatile Organic Compounds (VOCs). •  Fast oven heat-up allows faster chromatography, particularly useful when speeding up the elution of late eluting compounds. •  Fastest available cool-down rate is delivered using forced convection air. This greatly reduces non-productive time between runs. •  Universal Programmable Split-Splitless (PSS) and Programmable On-Column (POC) injectors design enables Large Volume Injection of volatile solvents and cold on-column injections without the use of expensive cooling agents •  Novel Swafer™ micro-flow technology dramatically simplifies complex tasks helping to make the Clarus 680 GC easily used by operators at all skill levels •  Complete instrument control is available through TotalChrom™, TurboMass™ as well as Waters® Empower™ 2 and Agilent® EZChrom Elite™ drivers.

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LC-MSLC-MS (liquid chromatography-mass spectrometry) systems and equipment are used for separation and quantitative analysis of complex mixtures, combining liquid chromatography and mass spectrometry. Quantify proteins, contaminants, pesticides or screen for drug metabolites with a high level of sensitivity. LC-MS systems and equipment include reverse phase, normal phase and specialized columns integrated with various MS detectors such as time-of-flight (TOF), quadrupole, orbitrap or ion trap mass analyzers. LC-MS/MS instruments equipped with a qTOF or triple quadrupole analyzer give greater sensitivity and resolving power to your analysis. Find the best LC-MS equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Mass SpectrometryMass spectrometry (MS) is a powerful analytical technique used to identify and quantify molecules based on the mass-to-charge ratio of gas-phase ions. It provides detailed information about the structure, composition, and properties of compounds and is widely used across fields such as environmental monitoring, materials science, drug discovery and development, food and beverage testing, and wider chemical research. Key MS techniques include tandem mass spectrometry (MS/MS), liquid chromatography–mass spectrometry (LS-MS) and inductively coupled plasma (ICP-MS). Choosing from these wide range of techniques and technologies can be a daunting task, so keep up to date with scientific applications, performance expectations, and customer reviews here all in one place. Visit our product directory to receive quotes direct from the manufacturer. Near Infrared SpectroscopyNear-infrared (NIR) spectroscopy measures the interaction of near-infrared light with a sample, including transmission, reflectance and absorbance, facilitating the identification of analytes. Measurements can be conducted using a Fourier-transform near infrared (FT-NIR) spectrometer, while there are also UV-Vis- NIR spectrophotometers that measure a broader spectrum of wavelengths. Find the best NIR spectroscopy products in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Food and Beverage ProcessingFood and Beverage Processing involves the preparation of food products for further analysis. Typical instrumentation includes blanchers, color sorters, cookers, grinders, and refrigeration. These are used to replicate the processes commonly used in the commercial preparation of food and beverages.GC-MS GC-MS (gas chromatography-mass spectrometry) instruments and equipment are used to separate, quantify and identify mixtures of small and volatile compounds, such as polycyclic aromatics, fatty acids and alcohols. Often used in drug detection, forensic investigation and environmental analysis for pesticides and contaminants, GC-MS is a powerful addition to your lab’s analytical capabilities. GC-MS/MS instruments equipped with a qTOF or triple quadrupole analyzers can give greater sensitivity and resolution to your analysis. Find the best GC-MS instruments and equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.MilkMilk is a dairy product that contains lactose. It is consumed by infant mammals to provide nutrients from the mother. In 2008, the Chinese milk scandal saw the unlawful adulteration of powdered milk with melamine.MilkMilk is a dairy product that contains lactose. It is consumed by infant mammals to provide nutrients from the mother. In 2008, the Chinese milk scandal saw the unlawful adulteration of powdered milk with melamine.Adulteration
Milk Adulteration with Melamine – Screening, Testing and Real-Time Detection