916 Ti‑Touch - Tutorial

Importance of the Topic

The accurate determination of acidity or basicity by titration remains a cornerstone of analytical chemistry. Modern potentiometric titrators like the 916 Ti-Touch improve reproducibility, user efficiency, and data integrity by integrating touchscreen operation, intelligent dosing units, and automated data management.

Objectives and Overview

This tutorial provides step-by-step guidance for setting up the 916 Ti-Touch, configuring titrants and sensors, creating titration methods, executing simple and advanced titrations, and managing multi-user access, using a dynamic pH titration as an example.

Used Instrumentation

• 916 Ti-Touch potentiometric titrator with touch-sensitive display
• 802 propeller stirrer or integrated magnetic stirring option
• 800 Dosino intelligent dosing unit or 805 Dosimat exchange unit
• pH electrodes (standard or intelligent iTrode via 854 iConnect)
• Buret tips, support rods, electrode holders
• USB or Ethernet printer interface
• Analytical balance via USB/RS-232 adapter

Methodology

• Mechanical installation: assembling stand, stirrer, electrode holder, dosing units, and tubing
• System configuration: registering titrants, sensors, printers, and balances
• Method creation: defining dosing devices, titrant properties, stop conditions, calculation templates, and report outputs
• Titration execution: cylinder conditioning (Prepare), live curve display, endpoint detection, and manual control options
• Data handling: sample entry via main dialog or sample table, automatic saving to USB/network, PC/LIMS report generation, and statistical evaluation
• User administration: single or multi-user login via password or ID profile, expert vs. routine dialog levels

Main Results and Discussion

The tutorial confirms that the 916 Ti-Touch offers intuitive touchscreen navigation, reliable hardware integration, and versatile software functionality. Automated endpoint recognition and live curve plotting ensure consistent titration performance, while built-in data export and reporting meet QA/QC demands.

Benefits and Practical Applications

• Efficient, reproducible acid–base analyses in research, quality control, and industrial laboratories
• Reduced training time and user errors through an intuitive graphical interface
• Comprehensive data management: on-device storage, USB export, network LIMS reporting, and PDF generation
• Customizable user access levels and audit trails for compliance in regulated environments

Future Trends and Potential Applications

Advances may include wireless IoT connectivity, deeper LIMS integration, AI-driven endpoint detection and method optimization, multi-parameter titrations (redox, complexometry), and cloud-based data analytics for remote monitoring and decision support.

Conclusion

The Metrohm 916 Ti-Touch combines modular hardware and flexible software to deliver a robust, user-friendly platform for both routine and advanced potentiometric titrations. Its comprehensive method configuration, automated data handling, and secure user management address the evolving needs of modern analytical laboratories.

Reference

• Metrohm AG. 916 Ti-Touch Tutorial, Article No. 8.916.8002EN, 03/2020.