The heart of the system is the 797 VA Computrace with two 800 Dosinos attached which are used for the addition of the solution
Bread, grain, cereal, rice and pasta are the basis of the food guide pyramid and should therefore play a prominent role in our diet.
Two third of the energy and half of the protein in the diet are provided by grains.
Cereals are an important ingredient in pasta, bread and pastry.
Therefore all of them contain lots of complex carbohydrates and some proteins.
The heavy metal content of grains is related to the environmental condition of the soil the cereal grasses have been grown upon.
If the flour is contaminated with heavy metals, at least some heavy metals will be found in cereal products as well.
Simultaneous determination of cadmium, lead and copper in cereal flakes by voltammetry.
Plant root absorb nutrients and contaminants from soil onto the cells.
From the roots they can be translocated into various other tissues of the plant.
Trace levels of metals such as copper and zinc are vital to plants but high quantities of heavy metals such as copper and lead can be physiologically injurious.
Highly mobile cadmium can also easily been taken up by plants through their roots.
It can accumulate in the cereal grains.
Cereal grains can absorb lead from the air at a significant rate.
Tin present in the sample does not interfere with the determination of lead.
An aliquot of the digestion solution is used for the voltammetric determination with the MVA-2 system on a hanging mercury drop electrode (HMDE).
The heart of this analysis system is a 797 VA Computrace enriched with the Dosino technique for liquid handling.
For your convenience, the method and relevant parameters are already implemented in the software of Metrohm's 797 VA Computrace.
Semi-automatic voltammetry system for routine trace analysis.
MVA-2 is an easy-to-use partly automated VA system for routine voltammetric trace analysis.
Two auxiliary solutions (standard and electrolyte) can be added automatically into the measuring vessel.
The sample, however, is handled manually.
So, just add the sample with a pipet, press start and receive the result.
Applications for the determination of one or two parameters can be realized.
The heart of the system is the 797 VA Computrace with two 800 Dosinos attached which are used for the addition of the solution.
The Dosinos are completely controlled by the 797 VA Computrace.
One additional 800 Dosino can be attached directly, 4 additonal ones by means of the 846 Dosing Interface.
Thus a maximum number of 7 Dosinos can be use Options.
MVA-3 system for fully automated analysis of small series of samples consisting of the 797 VA Computrace, a 813 Compact Autosampler, two 800 Dosinos, a 731 Relay Box and two 772 Pump Units.
