Huebner, R. and Haslam, R., 2011. An Investigation of the Effect of Mesh Size on the Effectiveness of Hotplate Aqua Regia Extractions. Communications in Soil Science and Plant Analysis, 42 (2), pp. 159-166.
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Aqua regia extractions with subsequent inductively coupled plasma determinations are a very common method of elemental analysis of soils and sediments. Before extraction, the material must be dried and sieved. Small variations in this early step can have a significant impact on the later outcomes, especially for unassisted (for example, without ultrasonic or microwave) extraction procedures. Therefore the impact of mesh size on the sieving process was investigated. A mesh size of 2.0 mm or greater yielded unacceptably high variations between the subsamples and a very poor recovery rate when compared to a 0.063-mm sieve. A mesh size of 0.3 mm resulted in the best outcomes, losing nearly no material in the ﬁne sediment samples and about a tenth in the coarse samples. The precision was high for the 0.3-mm samples as well, only negligibly surpassed by the 0.1-mm samples for some materials.
|Uncontrolled Keywords:||Accuracy; aqua regia; efficiency; grinding; mesh size; milling; precision; sieve|
|Subjects:||History > Archaeology|
|Group:||School of Applied Sciences > Centre for Conservation, Ecology and Environmental Change|
|Deposited By:||Mrs Jean Harris|
|Deposited On:||20 Apr 2010 15:06|
|Last Modified:||07 Mar 2013 15:25|
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