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Robotic Analyzers

From:   Author:   Date:2011-10-26  

Introducing Skalar’s Robotic Analyzers


Skalar’s Robotic Analyzers offer a flexible and affordable automation solution to all routine analytical laboratories. Automation is available for BOD, COD, pH, Conductivity (EC), Alkalinity, Carbonate/Bicarbonate, Turbidity, Color, Ion Selective Electrodes (ISE) applications, Clay fraction analysis and custom-made applications.

The analyzers are based on flexible platforms on which various kinds of liquid handling procedures can be automated. As an example, the system can be configured with a pipetting station that can dilute the original sample to different sized vials, which can be offered to different instruments for analysis.

The line of Robotic Analyzers consists of four different automation models, each offering their own specific advantages, but all providing ‘hands-free’, ‘walk-away’ automation. They range from small sized lowcost units to automate small sample batches through to the larger units that can analyze over a thousand samples per day.

The design of the Robotic Analyzers allows the instruments to meet your exact requirements resulting in increased productivity and accuracy of results, while reducing the sample turn-around time, eliminating errors and operator / sample interaction.

The analyzers are supplied with software for data handling and instrument control. The versatility and flexibility of the analyzers and the software allows an easy integration into any laboratory environment.

Biochemical Oxygen Demand (BOD)


The BOD analysis is one of the most common applications for water laboratories. All Skalar Robotic Analyzers can provide the automation for BOD. Various possibilities are available based on the sample load, budget and the level of automation. From 32 up to 120 BOD bottles can be set as uninterrupted sample batches. Sample trays can be added during analysis runs to handle any required sample load.

The analyzers can hold all available standard BOD bottles, and a wide range of sample trays are provided for various incubators. The automation of the labor-intensive BOD application can save up to 85% of operator time and provides the required consistency for the application.

Steps of Automation

•Addition of nitrification inhibitor / seed

•Addition of dilution water

•Sample homogenization

•Reading of Initial Dissolved Oxygen value (DO1)

•Probe rinsing between each reading

•Reading of Final Dissolved Oxygen value (DO2) after incubation

•Calculation of BOD according required regulations

pH / Conductivity, Alkalinity, Turbidity & Titrations


The Robotic Analyzers can handle the automation of a wide range of parameters combined into one system for sequential and simultaneous analysis.

Custom-made configurations are available to meet the requirements of any laboratory. This includes the choice of various applications, the running sequence and the integration of a variety of sample racks and sample beakers. For instance, when the system is configured for four applications (e.g. pH, Alkalinity, Turbidity and Color), it can be user-defined whether the applications are required to run parallel or sequentially. The system also allows the selection of the analysis performed on each individual sample.

Depending on the application, calibration of the instrumentation can be performed automatically to ensure an accurate performance. Quality control checks and standards can be placed in between samples and probes can be re-calibrated automatically.

This flexible design of the Robotic Analyzers allows combinations of various applications in one economical system.

• Alkalinity
• Dissolved Oxygen
• Conductivity
• Color
• pH
• Hardness
• Turbidity
• Titrations
• Ion Selective Electrode (ISE)

• Combinations for multiple applications
• Sequential or simultaneous analysis
• Barcode reader for sample identification
• Standard commercially available meters and probes used
• Flexible running sequence of individual parameters
• Rinse and Calibration procedures

Automation for Soil Analysis


The soil-pH influences the availability of minerals for the plant. Each plant has a certain pH at which it is optimally grown and produced. The pH analysis is the most common parameter carried out on soil samples. Specialized laboratories analyze the soil and provide farmers with the required information. Based on the analysis results, the best method can be selected to improve the soil quality resulting in increased crop quantities and cost reduction.

The Robotic Analyzer can be configured for measurement of soil-pH in water extracts as well as in KCl, CaCl2 or other extracts. The procedure includes the automatic calibration of the probe and addition of water, KCl or CaCl2 solution for extraction. Depending on the prescribed procedure, the samples are left to settle for a pre-defined time and / or stirred before the measurement continues. A multiple probe configuration is available to increase sample throughput.

The SP10 and SP50 provide an economical solution for small sample loads. The SP100 and SP1000 models can be configured with up to four probes for larger sample batches. Parameters, such as conductivity (EC), can be added.

Clay Fraction Analysis


Classification of soil is important for environmental control and construction purposes. Soil classification is based on several factors such as absorption, the ability to shrink or swell, water retention and permeability. Most of these factors independently correlate with the particle size (clay fraction) of the soil. The clay fraction is measured according to for instance ISO 11277 and allows the soil to be categorized within stated classes.

The procedure to determine the clay fraction of soil is divided into four steps: Weighing the sample,removal of organic matter, removal of carbonates and the determination of the clay fraction. This last step is automated on the SP1000 Robotic Analyzer.
The automation of this step is of particular interest because of the precise timing involved in the procedure. The sample is transferred into a volumetric cylinder of 1000 ml, which is placed onto the analyzer. Sodium pyrophosphate and distilled water are added automatically.

The sample is homogenized during a preset time interval. After a settling period (up to 8 hours) a portion of the suspension is taken at a pre-defined depth from the cylinder. This portion is transferred to an evaporation dish located on the SP1000 analyzer.

After drying, the remainder of the sample is weighed and the clay fraction is calculated by the software. This procedure can also be performed unattended allowing for overnight operation. The Skalar SP1000 offers an economical and ‘walkaway’ automation for the lengthy time-critical clay fraction analysis.

Robotic Analyzer Software


The Robotic Analyzers have been developed as a flexible automation solution to incorporate a wide variety of applications for single or multi-parameter requirements.

The software is designed as a modular data acquisition and instrument control system. For each Robotic Analyzer, the specific applications of the analyzer are pre-set in the software.

Simply creating a sample table and selecting a required application can start an analysis run. Calibration procedures are fully integrated if required before starting the analysis. Several access levels are available to prevent unauthorized data modification and operation.

During the analysis run, the results are displayed in real-time and calculated according to local and international regulations. Result display and calculations can be customized to meet each specific laboratory requirements. The sample table can be modified in case priority samples have to be analyzed.

The software consists of an analysis scheduler, including pre-set start-up and shutdown procedures including time intervals when required.

The Skalar Robotic Analyzer software compliments the range of Robotic Analyzers and meets the individual requirements of the busy modern laboratories.

Software Features
• Full analyzer control
• LIMS compliant
• Real-time result display
• User definable print and export options
• Storage of raw and calculated data according to Good Laboratory Practice (GLP)
• Optional barcode reader for sample ID’s
• Integration of customized applications
• Addition of samples during the run
• Automatic start-up and shutdown procedures