Introduction
SIA2000 automatic chemistry analyser is a low cost and versatile
instrument for a range of applications based on ion selective
electrode technology. The low cost makes it an ideal choice for
automating small batch analyses.
Applications
Originally designed for the measurement of fluoride in water
on a routine basis, this reliable technology has been extended
to incorporate applications in clinical, agricultural and industrial
sciences. Because of the ease in which a change of method can
be substituted and the simplicity of instrument operation, ion
selective electrodes offer a flexible alternative to other continuous
chemistry techniques both for laboratory use and monitoring stations.
The following are some of the typical applications for
SIA:
- Ammonia, Nitrate and Nitrite in soil samples
- Sodium and Chloride for clinical methods
- Fluoride in soil and water
- Total and free SO2 in beer and wines
- pH and conductivity
Performance
The established methods enable you to measure rapidly over a
wide concentration range using the appropriate ion selective
electrode and reference electrode. Levels down to ppb are readily
achievable. The concentration range should be specified when
ordering. Burkard Scientific method sheets provide information
on flow rates, reagents, sample loop sizes and manifold configurations
for standard or specific analyses. The laboratory based analyser
will handle samples up to 40 per hour unattended. The simple
construction enables quick interchange of electrode and flowcells.
When the method incorporates a flow injection valve, reproducible
timing of the loop volume can be accomplished using the Burkard
BT2000 loop timer with pencil switch. This is a useful option
when only a limited number of samples are being analysed.
The instrument
The SIA2000 is ideal for the laboratory with small sample numbers
that arrive on an irregular basis. It is equally effective for
continuous analysis in monitoring industrial processes. The design
of the SIA system allows the analyser to be purchased as modules
to more accurately meet the user requirements. The add-on potential
means that the sampling option or data processor could be acquired
later as the work load increases. Standard equipment includes:
Selective ion analyser, reference electrode, ion selective electrode
or combination electrode (to be specified when ordering), mains
and interface cables.
Analysis module
The SIA2000 analysis module comprises a multi-channel fixed
or variable speed peristaltic pump, an injection valve (or valves),
heating baths fitted with two PTFE coils and a dual flow cell
carrying the ion selective and reference electrodes. Individual
power sources are provided for heating, valve and interface circuits.
Detector output and temperature are continuously displayed. An
interface is fitted to enable the electrode response to be amplified,
linearised and output to a chart recorder or data handling system.
Anionic and Cationic species, both univalent and divalent, may
be analysed over a wide concentration range giving a positive-going
linear calibration.
Sampling options
SIA2000 offers you fully automatic sampling with a choice of carousel or XYZ sample
changer. An automated system will present standards and samples
in sequence. Automatic dilution of over-range samples is available
as an option on the XYZ. However to alleviate the need for over-range
dilution the MicroStream data-processor has an extended concentration
range enabling the results to be printed out at up to 10 times
the normal calibration standard. When the instrument is not used
with a sample changer a low-cost manual injection timer is available
to ensure precise loop filling. In addition, each valve has a
manual injection button as standard to assist you with setting
up of the individual chemistries.
The manifold system
Standard components are used to construct the plug-in chemistry
manifolds. Ready assembled units are available for the most commonly
used methods. Where possible a single manifold can mount two
related chemistries. Pump tube and valve connections are conveniently
positioned and colour coded for identification. It takes only
minutes to make a change of method.
Detectors
The analyser has a self-contained electronic control circuit
to process the mV output signals from the electrode. Zero, gain
and offset are the three manual controls for set up. Signals
from any selected electrode in the range are amplified processed
and output directly to the Microstream data processor. A digital
display of the mV output assists with zeroing and sensitivity
setting. The electrode should be specified when ordering.
Data capture and processing
SIA2000 can be offered with MicroStream,
a powerful multi-tasking system based on Windows™ software. MicroStream
will speed up your calculating and reporting. Starting with a
low-cost package for single-channel use, this system can be expanded
to run up to four independent multi-channel analysers. Quality
control software checks the accuracy of analysis and all results
can be downloaded to other software packages and LIMS. MicroStream
is compatible with Windows™ based networks.
Total Automation
All Burkard Scientific analysers can be fitted with the computer
controlled automatic start-up and shut-down. A motorised wash/reagent
changeover system ensures that all reagent lines are automatically
connected to a water-wash on completion of analysis. The computer
returns the valve to reagents for restart. Other computer control
options are possible, e.g. reagent level sensing, special functions
and interfacing to other instruments, sample preparation and
calibration using the AMD2000 automatic
micro-dilutor system.
Standard chemistry methods
Data sheets are available and supplied with every method. Full
information on the make-up of standards, preparation of individual
chemicals, wash materials, sampler settings and manifold connections
is included. Internationally certified methods are used where
applicable. Please ask for our applications list or datasheet.
Special or new applications
Burkard Scientific method development is ongoing. If you have
a special measurement using ion selective electrode that would
benefit from automation call our product development team for
advice or assistance on any application.
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