Qwave and QlabPro are among the most advance microwave digestion systems for acid digestion and metal digestion. Qwave is ideal for open as well as closed vessel digestion. Our sample preparation is ideal for soil sample testing.
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Assisting Microwave Digestion Systems with Automation for associated sample workup tasks.
1. 6660 Kennedy Road, Unit 14A
Mississauga, ON L5T 2M9 Canada
Tel: 905 362 1225 Web: www.QTechCorp.com
QT-600 - Updated Oct 28, 2019
ASSISTING MICROWAVE
DIGESTION SYSTEMS WITH
AUTOMATION FOR ASSOCIATED
SAMPLE WORKUP TASKS.
Microwave-assisted sample digestion techniques excel in decomposing tough samples completely
by raising the temperature of reagents higher than the boiling point. The key to increasing the
boiling point of reagents is their entrapment in Teflon® lined close digestion vessels.
The usual digestion process starts with the samples being weighed in Teflon® liners and digestion
reagents added thereafter. Current Microwave Digestion System are available from various
manufacturers that handle from 12 to 40 samples at a time as a batch. Weighing and adding
reagents to that many samples presents a significant task for the human operator, with sample
accuracy, and human safety being paramount challenges. At the end of the digestion-cycle, sample
dilutions become a challenge as the liners are not transparent. Therefore, typically these samples
are transferred to transparent standard flasks for post digestion sample-prep. Doubtless, this
essential process of sample transfer to the flasks demands a lot of labour and care; it is time-
consuming. Thus, even though the samples may be digested in under 30 min, it takes a lot longer
to get the samples in a form to be available for analysis on spectroscopy instruments.
2. 6660 Kennedy Road, Unit 14A
Mississauga, ON L5T 2M9 Canada
Tel: 905 362 1225 Web: www.QTechCorp.com
QT-600 - Updated Oct 28, 2019
So, what is the solution? Well, automating the peripheral tasks of the Microwave Digestion process
can definitely provide significant time relief with enhanced throughput and safety. The Vulcan
automated workstation from Questron is an effective such time relief. Multiple reagent
dispensing, sample dilutions, and sample transfers are effectively handled by this system. The
system comes with racks specifically made for holding the user microwave liners so they can be
easily processed. Before the actual sample digestion step, Vulcan readies the liners by adding
mandated reagents, following which the vessels undergo the microwave digestion step. At the end
of this, samples are brought back to Vulcan for dilutions and homogenizing without any vessel
exchanges. Precise dilutions and transfers are performed with the aid of a built-in ultrasonic
sensor, and a choice of built-in multiple peristaltic or syringe pump modules. For agitation of
samples to facilitate mixing, short bursts of air bubbles are used by the system. Finally, prepared
samples can be transferred to autosampler racks that are carried to analysis instruments.
In summary, the peripheral yet critical tasks associated with a microwave digestion system can be
easily handled by Questron’s Vulcan automation system. Not only does this significant automation
yield higher accuracies and sample prep quality, it also saves labour and promotes lab safety.