Comprehensive tap water analysis with TitrIC 1

Importance of the Topic

Ensuring the quality of tap water is critical for public health and environmental monitoring. Accurate quantification of inorganic ions and water properties supports compliance with regulatory standards and informs treatment processes.

Objectives and Study Overview

This application bulletin demonstrates a fully automated workflow for comprehensive tap water analysis using the TitrIC 1 system. The goals were to measure major anions, cations and direct parameters in parallel and to assess precision, accuracy and recovery for a typical tap water sample from Herisau.

Methods and Instrumentation

The study employed ion chromatography with a Metrosep SUPP 5–100 column and carbonate–bicarbonate eluent with chemical suppression. Key titrations included p value and m value (acid capacity), and EDTA titration for calcium and magnesium. Direct measurements covered pH, conductivity and temperature. Reagents included sodium carbonate, sodium bicarbonate, sulfuric acid and titrants such as HCl and EDTA. Calibration standards ranged from trace levels to tens of mg L-1 for common ions.

Used Instrumentation

• 861 Advanced Compact IC with sequential suppression
• 809 Titrando autotitrator with two measuring inputs
• 815 Robotic Sample Processor
• 712 Conductometer and Aquatrode Plus for conductivity
• Polymer membrane calcium ion selective electrode
• 800 Dosinos for precise liquid handling
• tiamo 1.1 software for method control and data processing

Main Results and Discussion

Reproducibility tests of ten water samples showed relative standard deviations below 5% for IC anions and below 3% for titrimetric parameters.
Recovery experiments with spiked samples yielded recoveries between 93% and 105% for anions and around 100% for cations, confirming method accuracy.
Calibration curves displayed high linearity with correlation coefficients above 0.998.

Benefits and Practical Applications

The combined approach enables simultaneous determination of multiple water quality parameters in a single automated sequence. It reduces manual intervention and enhances laboratory throughput. The system flexibility allows easy adaptation to different water matrices and compliance testing.

Future Trends and Possibilities

Advances in automation and software integration will further streamline water analysis workflows. Expanding the method to additional ionic species, coupling with mass spectrometry detectors and integrating real time data management will open new monitoring capabilities. Miniaturization and field-deployable ion chromatographs may enable on site water quality screening.

Conclusion

The application of TitrIC 1 for tap water analysis provides a robust and fully automated solution for routine monitoring of anions, cations and key physical parameters. The method demonstrates excellent precision, accuracy and operational efficiency.

Reference

No external literature references were provided in the source bulletin.