Phone in as we have the experience to discuss and advise
 on the right instrumentation for many applications

PREPARATION OF SAMPLES FOR QUANTITATIVE ANALYSIS

X-Ray Diffraction and Infra-Red Spectroscopy:
Wet grinding results in the least damage to the samples’ crystal structure which is crucial for XRD and IR. It also makes for easier total sample recovery, eliminates manual element and vessel cleaning and reduces sample oxidation and cross contamination. It is superior to dry grinding in that it yields much smaller particles, narrower particle size distributions and gives more uniform phase distributions.

Atomic Absorption Analysis:
In the case of samples which are difficult to dissolve, grinding with the mill is found to greatly facilitate subsequent acid digestion or alkali fusion.

Almost all substances can be reduced to sub-micrometre sizes. Soft materials, like some plastics and metals, cannot be successfully ground to these sizes. Even in the presence of suitable liquids they show a tendency to reweld. However, several authors have reported success with some metals (nickel, iron, cobalt), and the difficult platey minerals (mica, talc, graphite). Through the use of selected grinding aids (certain inorganic salts) and grinding liquids, it has been found possible to reduce these to O.µm2,3.

The mill must be secured by substantial wood screws or bolts to a rigid bench. It is highly important that neither the mill nor the bench vibrates during operation. All the vibrational energy available should be directed to the grinding jar and holder and not to any other structure. Indeed, the mill will operate at its greatest etficiency if the rubber pads on the base are removed before bolting it tightly to the bench. Ideally, vibration of the mill unit should scarcely be detectable.

Belgian optical sand before grinding

200µm

Experiment 2

Conditions: Charge of 2.0g of graded Belgian optical glass silica sand of particle size 285µm +- 15µm; 10 ml of water.Ground for 10 minutes with corundum grinding elements.
Results: 2.0g of dried product recovered. Average diameter of product was 6µm. Largest particle present was 14µm

Belgian optical sand after grinding

200µm

Tel 

Fax