Broyeur ultra-centrifuge ZM 200
Rapport de tests
Du plomb dans les jouets ? Un contrĂŽle sâimpose.
Une grande partie des jouets vendus sur les marchĂ©s amĂ©ricains et europĂ©ens est fabriquĂ©e en Chine. Or ceux-ci connaissent de vives critiques en ce qui concerne la qualitĂ© au vu de la prĂ©sence de matiĂšres potentiellement dangereuses, susceptibles dâaboutir Ă des actions de rappel et rĂ©clamations de dommages et intĂ©rĂȘts onĂ©reuses. Plus les cas signalĂ©s sont nombreux, plus les consommateurs hĂ©sitent Ă acheter des articles venus de Chine, ce qui justifie donc un contrĂŽle sans failles dans lâintĂ©rĂȘt des fabricants. Depuis lâentrĂ©e en vigueur de la directive europĂ©enne RoHS (Restriction of Hazardous Substances), la limitation de lâutilisation dans les biens de consommation de substances telles le plomb, le cadmium ou le mercure, est clairement rĂ©glementĂ©e.
Analysis of cadmium in plastics
In recent years, mass media have focused on the topics of the environment and environmental conservation. With the advancement in scientific technology, resource development has progressed.
Bigger is not Better
There is a trend towards smaller samples that have more controlled particle size and yet remain representative of the material being analyzed.
Cement - representative sample preparation is important
To produce high-quality cement, the mineralogical and chemical composition of raw materials as well as intermediate and finished products has to be determined. At each stage of the production, samples have to be taken, processed and analysed to ensure quality control without gaps. Retsch offers a range of instruments that are used for sample preparation during the complete production process, from the quarrying of the raw materials to the final product. The typical sample preparation process involves preliminary size reduction, sample division and fine size reduction before the sample can be submitted to further analyses....
Cryogenic preparation of sample materials
Within the context of sample preparation, size reduction plays an important role as it has a substantial influence on the results of the subsequent analysis. If the particles are too coarse or inhomogeneous the results of the analysis may turn out to be incorrect, especially if there is only a very small amount of sample material which represents the total amount.
Los especial del pigmento
Debido a la ilimitada variedad de colores y texturas que ofrencen los recubrimientos en polvo; muchos de los nuevos recubrimientosde aplicaciĂłn especifica se crean en el laboratorio en pequeñas cantidades que luego se le envĂan al cliente para su aplicaciĂłn y aprobaciĂłn.
Molienda ultrarrĂĄpida y ultrafina
El nuevo molino ultracentrĂfugo ZM 200 de RETSCH es un molino de rotor no sĂłlo extremadamente rĂĄpido y cuidadoso con el material molido, sino tambiĂ©n de uso universal gracias a su amplia gama de accesorios.
Reliable sample preparation in food technology
An efficient sample preparation procedure for rapid, reliable and reproducible analytical results is becoming increasingly important today. Ever more stringent requirements are being set both in research and production, e.g. for product monitoring and quality control.
Sample Preparation of Electronic Scrap in the Context of RoHS and WEEE
Since August 2004 new EU directives for the disposal of used electrical and electronic appliances as well as the restricted use of certain hazardous substances in these devices have become effective.
Sample Preparation of Plastics for X-Ray-Fluorescence Analysis
The elemental analysis of plastics has become more and more important. EC directive 91/338/EWG regulates the ban of cadmium in PVC, EC directive 94/62/EC defines limits for cadmium, lead, chromium and mercury in packing materials and EC directive 2000/53/EC defines limits for the same elements in end-of-life vehicles. This has created a strong need for a rapid and reliable testing method.
Sample Preparation of Solid Materials for the XRF-analysis
X-Ray fluorescence is one of the most versatile methods to determine elements in a sample. The material is exposed to x-rays that cause each element to emit its own unique fluorescent x-ray. The subsequent analysis of the results is based on comparisons to standard samples with given chemical composition.
Sample preparation of electronic scrap with SM 2000 and ZM 200
RETSCH mills in the context of RoHS and WEEE
Size reduction within the context of sample preparation
In general âsize reductionâ is taken to mean the disintegration of solid substances by mechanical forces without altering their state.
The Representative Sample Preparation of Waste
Now that a certain environmental awareness has developed in the population over the past few years, our efforts are geared not only to avoiding waste, but also to reducing the mountains of waste which still arise by means of raw material recovery and the reintroduction of secondary raw materials into the industrial cycle.
Tracking down hazardous substances (RoHS/WEEE)
Preparing electronic waste for obtaining representative analytical samples.
A solution for converting an electrical appliance into a meaningful analytical sample is described using a remote-controlled toy car as an example.
Vom Netzkabel zur Analysenprobe
Seit August 2004 gelten neue EU-Richtlinien zur Entsorgung von Elektro- und Elektronik-AltgerĂ€ten sowie zur BeschrĂ€nkung bestimmter gefĂ€hrlicher Stoffe in diesen GerĂ€ten, welche die EU-Mitgliedsstaaten in nationales Recht umsetzen mĂŒssen.Diese Richtlinien haben auch Auswirkungen auf Analyselabors.
Von der Probe zum Pressling â Probenvorbereitung von Feststoffen fĂŒr die Röntgenfluoreszenz
Aufgrund der Einfachheit der eigentlichen RFA-Messung wird hĂ€ufig der Aspekt der optimalen Probenvorbereitung ĂŒbersehen, was sich dann in mangelnder Reproduzierbarkeit bis hin zu falschen Ergebnissen auswirken kann.
Zerkleinern von Proben in einem DĂŒngemittellabor
FĂŒr die genaue und reproduzierbare Analyse von DĂŒngernĂ€hrstoff, SpurennĂ€hrstoffen und Spurenmineralien ist das vorherige Zerkleinern der Probe unverzichtbar. Das DĂŒngerlabor der Division of Regulatory Services der University of Kentucky verwendet zum Homogenisieren der Proben die Ultra-ZentrifugalmĂŒhle ZM 200 von Retsch.
ZuverlÀssige Probenaufbereitung in der Lebensmitteltechnologie
Eine effiziente Probenaufbereitung fĂŒr schnelle, zuverlĂ€ssige und reproduzierbare Analyseergebnisse wird in der heutigen Zeit immer wichtiger. Sowohl in der Forschung, als auch in der Produktion, z. B. bei der ProduktĂŒberwachung und QualitĂ€tskontrolle, werden immer strengere MaĂstĂ€be gesetzt.
Flyers d'application
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Agriculture
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Biotech
Sample Preparation for the Biotech Industry
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CarbĂłn
PreparaciĂłn de muestras para la industria del carbĂłn
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Cement
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Fast Sample Preparation for Acrylamide Analysis in Food
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Food
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Food and Feed Industry
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Milling of Samples in a Fertilizer Laboratory
The fertilizer laboratory of the Division of Regulatory Services at the University of Kentucky uses the Retsch ZM 200 ultra centrifugal mill for milling fertilizer samples.
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Optimale Aufbereitung von SekundÀrbrennstoffen
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Pharma
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Pharma
Sample Preparation for Pharmaceutical Testing
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Plastics
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Sample Preparation for Environmental Analysis (RoHS )
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Sample Preparation for Heavy Metal Analysis RoHS / WEEE
Subject to technical modifications and errors
