Our FIA system serves the purpose of automated photometric determination of ions in aqueous solutions, food extracts and soil eluates. Based on standardized determination methods, it was developed for use in laboratories for water and environmental analysis. The technology of flow injection analysis (FIA) enables accurate sample examination with short analysis and start-up times.
The compatibility of FIA Nexus with its predecessors FIAmodula and FIAcompact guarantees the easy extension of existing systems.
More details on specifications
All FIA samplers are equipped with a peristaltic pump, which is used to automatically feed the samples to the FIA Nexus analysis device. They also have a mixing position, which, in combination with a dosing device, enables automated sample dilution.
There are two models of FIA samplers (PS 61F and PS 62F) with different sample trays.
The autosampler PS 61F is suitable for smaller numbers of samples. The device is equipped with an additional stirring function, which enables a homogenization of the samples on the middle and outer tracks of the sample tray shortly before and during sampling.
The following tray types are available:
In addition, the FIA samplers can also be used as a stand-alone automated sample pre-treatment system (SamplePrep) when combined with a dosing unit.
An alteration / adjustment of the methods as well as the development of new methods is easily done due to the simple handling of the software.
Furthermore, at customer’s request, we can also check the adaptation of existing methods from old devices from other manufacturers (e.g. Foss, Lachat) and, where appropriate, implement them for our system.
Here are more details on two of the most requested method units:
The Universal method unit enables the determination of the basic parameters nitrate, nitrite, ammonium and orthophosphate. These parameters can be determined one after the other without changing the system. The change between the parameters to be measured can be done quickly and easily by switching valves located on the method unit.
The Universal method unit is particularly recommended for laboratories with low sample throughput.
Measurement ranges of the individual parameters:
Ammonium: 0,1 … 50 mg/l NH4-N DIN EN ISO 11732
0,02 … 20 mg/l NH4-N (wide range cell)
Nitrate: 0,02 … 15 mg/l NO3-N DIN EN ISO 13395
Nitrite: 0,01 … 10 mg/l NO2-N DIN EN ISO 13395
Orthophosphate: 0,02 … 20 mg/l PO4-P DIN EN ISO 15681
By integrating a digestion unit consisting of an UV and thermal reactor, the method unit can also be used for the determination of total nitrogen (TN).
Total nitrogen: 0,05 … 20 mg/l TN
For the determination of cyanide, the FIA Nexus device is equipped with an additional second peristaltic pump and a digestion unit for the selective release of cyanide from metal complexes according to the flow injection method DIN EN ISO 14403-1, which describes the pyridine-free determination of free and total cyanide. Gas diffusion of the released cyanide in a membrane cell eliminates possible interferences caused by the sample matrix.
Free cyanide: 0.001 … 1 mg/l FCN
Total cyanide: 0.001 … 1 mg/l TCN
By adjusting the enrichment time and the channel depth of the gas diffusion cell, the measurement range can be adjusted to customer requirements.
The MLE analysis system is controlled by the FIAStudio software developed on behalf of MLE.
The system is set up with the software that allows for the creation of methods, special procedures and analysis routines. It organizes the automated start-up of the individual channels, series management and shutdown of the system.
Furthermore, the autosampler with dosing unit is managed and controlled as well as the assignment of standards, control samples and samples to the sample tray is recorded.
Further features are: