27 Particle Characterisation Knife Mill Delivers Fast Representative Samples for Reliable Analysis
The Knife Mill PULVERISETTE 11 from Fritsch provides a homogeneous sample in a very short time and is ideal for a wide range of different materials, regardless of whether the sample is dry, moist, soft, medium-hard, fibrous or oily. It is the perfect instrument for sample preparation in the fields of foodstuffs or animal feed testing, agriculture and forestry, biology, pharmaceuticals and chemistry. The standard knife made of stainless steel can be used for comminution of nearly all materials due to its four blades and a well-conceived geometry. For comminution of brittle, hard samples the stainless steel sickle knife is recommended.
In addition to the grinding vessel made of scratch-resistant Polycarbonate, a stainless steel 316L grinding vessel for cryogenic comminution and for grinding harder sample materials is available. Alternatively, a glass grinding vessel for food-safe analysis and for verification of polymers is available. For grinding oily samples and for BPA-free sample preparation, the Eastman Tritan Copolyester grinding vessel is recommended.
The freely adjustable Vario-Lid system can be used to reduce the grinding chamber volume down to 0.54 litre and to manually compress and loosen up the sample material at the beginning and at any time during comminution. The grinding vessel, lid and knife of the PULVERISETTE 11 can be cleaned in a dishwasher. Depending on the version, all parts which come into contact with the sample materials such as grinding vessel, lid and knife are autoclavable.
Difficult to grind samples such as gummi bears, chocolate or plastic toys can be embrittled with liquid nitrogen for comminution directly in the stainless steel 316L grinding vessel. The sample material remains 100% cold. Just select the special lid with the easily exchangeable single-use sieve insert.
The PULVERISETTE 11 allows users to program and save up to 20 Standard Operating Procedures (SOPs). In each SOP you can save up to 15 grinding sequences.
All saved SOPs can be uploaded, exchanged and saved with the free SOP editor by laptop via the integrated USB interface. Simply download the SOP Editor at
www.fritsch.de/p-11/sop.
With the software P-11Control, the mill can be controlled via the integrated USB port. SOPs can be edited, saved and managed directly on the connected laptop via drag & drop. Reversion-proof grinding reports can be created, archived quickly and easily with the integrated report generator.
More information online:
https://www.youtube.com/embed/v1f4TgAzRDE?rel=0
49418pr@reply-direct.com
Accurate and Repeatable Particle Sizing using Laboratory Test Sieves
A Laboratory test sieve is an instrument which is used for the measurement of particle size. In its most common form, it consists of a woven wire screen, with square apertures, rigidly mounted in a shallow cylindrical metal frame. For coarse sieving a perforated plate screen with square or round holes may be used in place of wire mesh. Square hole perforated plate sieves range down to 4 mm and round hole sieves down to 1 mm aperture.
The sizes of solid particles from 125 mm down to 20 µm can be measured rapidly and efficiently by means of standard test sieves. Special sieves with apertures smaller than 20 µm are available, but it should be appreciated that the finer a screen is, the more easily will certain types of particulate solids tend to block or blind the apertures. Nevertheless, ‘micro’ sieving can be carried out down to 5 µm using special techniques.
Particle size, as measured by test sieving, may be specified simply by quoting two sieve sizes, one through which the particles have passed, and the other on which they are retained, i.e. the particle size distribution.
Endecotts Ltd provide all the equipment necessary to perform meaningful particle size analysis using sieves to receive accurate and repeatable results every time. More information online:
ilmt.co/PL/Ld3m
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FRITSCH Dynamic Image Analysis
Particle Sizer ANALYSETTE 28 ImageSizer – Fast analysis of particle shape and size
ACS Fall 2019 National Meeting & Expo
Booth 1445 August 25 – 29 San Diego, CA
• Extra wide measuring range, individually adaptable • High-performance camera with telecentric lenses • Extensive library for morphological analysis • Fast alternative to sieving
• Practical tools for reliable quality monitoring • Easy operation due to SOP control and report generator
FRITSCH GMBH · MILLING AND SIZING · INDUSTRIESTRASSE 8 · 55743 IDAR-OBERSTEIN · GERMANY · PHONE +49 67 84 70 0 ·
INFO@FRITSCH.DE ·
WWW.FRITSCH.DE www.fritsch.de
ANALYSETTE 28 ImageSizer Measuring range 20 µm – 20 mm For powders and bulk solids as well as suspensions and emulsions
Brilliant idea: the FRITSCH Cloud for direct visual evalu- ation of the measuring results. It shows all the particles in the form of a cloud with many more possibilities for recognising the most important measurement statements at the glance. Particularly simple and uniquely flexible. More info:
www.fritsch-international.com/a-28imagesizer
FRITSCH. ONE STEP AHEAD.
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