Rotary Cone Sample Divider LABORETTE 27
Available from FRITSCH
Today modern analytical instruments for particle characterisation for example can achieve previously unheard-of levels of precision.
Unfortunately, it is frequently overlooked that the overall error in analysis is comprised of the measurement error of the analytical instrument plus the sampling error.
The error due to sampling becomes larger when, as is often the case, an analysis quantity of less than 200 mg is required and the original sample quantity available to the lab is, for example, 2,000 g. For this reason, it is necessary to divide the total quantity into a representative sub-quantity.
The aliquot should be representative and have the same physical and chemical properties as the whole quantity.
The ideal way to obtain a representative sample is to use the Rotary Cone Sample Divider LABORETTE 27 from FRITSCH.
The design is based on the combination of various dividing processes in one instrument. The sample is fed through a funnel to a dividing cone with a shape that allows for quartering and coning of the material. Against the surface of the cone, the sample material is accelerated outward through rotation of the entire system and divided by guide channels into 8, 10 or 30 individual material flows depending on the dividing head used. Due to the rotation of the dividing head, the number of dividing steps is increased up to 2600 per minute, so that the final reduced sample is made up of a very large number of individual samples.