Food & Beverage Analysis


The Multiwave 7101/7301/7501 Series: Demanding samples, Easy digestion Anton Paar recently introduced the Multiwave 7101/7301/7501 series, a versatile selection of PDC-based (pressurised digestion cavity) microwave digestion systems designed to meet diverse analytical needs with efficiency and cost-effectiveness. This series caters to both routine and demanding samples, offering specifications of up to 300°C and 199 bar to ensure complete digestions.


Operators can customise their microwave digestion systems by choosing from seven different racks capable of accommodating vials ranging from 7 mL to 80 mL This flexibility allows for acid digestion of up to 4 g per position. The available vial options include borosilicate glass for routine applications, quartz for low blank values and low detection limits, PTFE-TFM for digestions using hydrofluoric acid, and sealed quartz vessels for special applications involving extremely volatile analytes.


Multiwave 7301 is a compact and user-friendly microwave digestion system that excels at handling challenging samples. Equipped with features like integrated cooling, a 9” touchscreen, smart lighting, e-mail notifications, and remote monitoring via VNC, it provides a comprehensive solution with the smallest footprint in its category. Compliance with standard acid digestion methods, a selection of vials and racks to optimise sample throughput, and optional powerful stirring make Multiwave 7301 suitable for various applications.


For applications requiring corrosion resistance and frequent use of HCl or aqua regia, Multiwave 7501 is the ideal choice. This system, backed by a three-year warranty, features upgraded parts and extended automated cleaning procedures, ensuring longevity and reliability. Its capabilities extend to challenging tasks such as the digestion of platinum group metals, showcasing its ability to handle high temperatures, long reaction times, and highly corrosive conditions.


Multiwave 7101, on the other hand, presents a cost-effective option within the series. Operating with PDC-based technology and an external circulation cooler, it offers an attractive price-performance ratio. With streamlined software-guided workflows and safety features, including a liner lift and drip cup for transportation, Multiwave 7101 ensures ease of use and safety during high-pressure, high- temperature digestion protocols. Its budget-friendly vials and low acid consumption make it suitable for institutions like universities with shared lab facilities.


In summary, the Anton Paar Multiwave 7101/7301/7501 series delivers a range of solutions to accommodate diverse analytical requirements. With their advanced features, flexibility, and reliability, these systems provide efficient and cost-effective options for sample preparation in various research and industrial settings.


More information online: ilmt.co/PL/WlJX 61858pr@reply-direct.com Lovis 2000: Precision meets polymer analysis


Anton Paar’s Lovis 2000 microviscometer enables reliable and precise determination of intrinsic viscosity in polymer measurements, facilitating fast and efficient quality control, e.g. for food packaging materials. The instrument’s software is specifically designed for polymer measurements, making it an ideal tool for these applications.


The Lovis 2000 microviscometer operates according to Hoeppler’s falling ball principle, accurately measuring the rolling time of a ball through transparent and opaque liquids. It specialises in low-viscosity samples, delivering critical data like dynamic viscosity, intrinsic viscosity, and polymer molar mass. The instrument’s advanced Peltier thermostatting offers rapid and precise temperature control from 5°C to 100°C, and extending down to -30°C with additional counter-cooling. It accommodates viscosities from 0.3 mPa.s to 10,000 mPa.s with an accuracy up to 0.5% and repeatability up to 0.1%.


The accompanying polymer software automatically calculates key parameters such as intrinsic viscosity, K-value, and molar mass. By measuring both the pure solvent and polymer solution and inputting the polymer concentration, it derives the relative viscosity. This serves as the foundation for calculating intrinsic viscosity (e.g. according to Billmeyer, Solomon-Ciuta) which in turn correlates with the polymer solution’s average molar mass.


Further, the hardware is also specially designed to improve polymer solution measurements. The instrument’s pivoting measuring head is able to adjust for shear rate. This has been shown to work ideally for shear-thinning solutions like dissolved polymers. Additionally, Lovis 2000’s chemical resistance is a significant advantage with regard to corrosive solvents which are often used in polymer analysis. Optionally available components like gold-coated balls, Kalrez O-rings, and PCTFE capillaries enhance the durability when necessary. The system’s hermetically sealed design combined with the small sample volume increases safety when testing volatile or toxic samples. The instrument has been effectively employed across a wide array of applications, particularly in the polymer sector. It has demonstrated proficiency with traditional polymers like PE, PET, and PVC, and is equally adept at handling the increasingly important category of biopolymers


This microviscometer isn’t just a standalone unit; it can be combined with Anton Paar’s DMA M density meter for comprehensive analysis of density, kinematic viscosity, and dynamic viscosity. The option for modular combination with other Anton Paar instruments like the Abbemat refractometer further extends its functionality. And when productivity is a priority, it can also be complemented with the Xsample autosampler for increased throughput and automatic measurement of up to 96 samples.


Lovis 2000 is a gateway to greater efficiency, offering a compact solution for extensive analysis with minimal sample volume, essential for effective quality control in the dynamic world of polymer measurements.


More information online: ilmt.co/PL/eNlG 61859pr@reply-direct.com Elevating quality control in the food industry


In the ever-evolving landscape of the food industry, precision and efficiency in quality control are paramount. Addressing the diverse needs of food manufacturers, Anton Paar’s ViscoQC 300 rotational viscometer emerges as a game-changer, offering an advanced solution for viscosity testing.


Streamlining test procedures for non-flowing products When measuring the viscosity of pasty, non-flowing samples (e.g., jams, bread spread, etc.) with standard cylindrical measuring geometries of a rotational viscometer, there is a risk in creating an air channel within the sample, which leads to incorrect measurement values as the spindle is no longer in contact with the product. The use of the motorised Heli-Plus accessory with T-bar spindles eliminates this channelling problem. While the spindle rotates, the viscometer automatically travels downwards through the sample resulting in a helical movement. This ensures that the spindle constantly is in touch with fresh sample.


At the heart of Anton Paar’s ViscoQC 300 capabilities is its ability to standardise test procedures through the revolutionary feature of digitally defining the start, immersion, and reversing positions of the measuring geometry. Recognising that different products may demand specific testing parameters, Heli-Plus empowers users to customise and save method-specific set points, ensuring that each test method adheres to the same predefined criteria, as the Heli-Plus is fully controlled via the viscometer. The result is a streamlined quality control process that minimises variations, enhances reliability, and ultimately contributes to the production of high-quality products.


Yield behaviour: Fundamental for quality control


In Scenario 1, tomato paste resists easy dispensing from the tube even with moderate pressure. Contrarily, in Scenario 2 a salad dressing effortlessly gushes out of the bottle with just a slight squeeze. Both of the mentioned products share a common quality control challenge referred to as ‘yield stress’. In simple terms, yield stress denotes the force necessary to initiate the flow of a fluid or soft- or semi-solids like puddings or sauces.


Yield stress testing is best carried out with vane spindles. The primary benefit of the vane spindle is that it imparts minimal disruption to the sample during spindle immersion. When immersed into the product, a portion of the test sample is trapped between the vanes, thereby creating a ‘cylinder’ of sample that can be used to calculate shear stress and ultimately the yield stress/point, providing complete flow curve data for viscosity analysis.


More information online: ilmt.co/PL/EV6G 61860pr@reply-direct.com


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