Vibro-broyeur MM 400
Brochures
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Brochure générale
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Broyeurs Ă billes
MM 200 / MM 400 / PM 100 CM / PM 100 / PM 200 / PM 400 / PM GrindControl
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.
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.
Cryogenic disruption of yeast cells
The MM 301 can be used for cell disruption applications. In this case, yeast cells were embrittled with liquid nitrogen.
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.
Green Chemistry in the Lab
Mechanochemistry is a very effective method to carry out syntheses without solvents and by-products. The technical literature describes a great number of reactions where a conversion of 100% is achieved. A precondition for the establishment of mechanochemistry in the industrial sector is the availability of suitable laboratory mills. A decisive factor is that â similar to conventional preparative chemistry â ambient parameters such as pressure and temperature can be documented and monitored. The Planetary Ball Mills and Mixer Mills from Retsch fulfill these requirements.
Making Whole Cell Extract of Saccharomyces cerevisiae
Preparation at the Courtesy of the Staley Lab at the University of Chicago
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.
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.
Tracking Down Fake Cashmere
Cashmere wool is the best known precious wool. It is won from the cashmere goat which originates from the high mountain region of the same name. Due to its properties such as softness and warmth, cashmere wool gains more and more popularity in the manufacture of clothing. Genuine cashmere is won solely from the goatâs downy hair and must possess a certain hair structure with an exactly defined length and thickness.
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.
Subject to technical modifications and errors
