Intelligent Potentiometric Titrator

I. Product Introduction

This series of automatic potentiometric titrators is a precision analytical instrument integrating high precision, intelligence and modular design. The core platform supports basic acid-base, redox, precipitation and complexation titration modes, and is extended with advanced detection modules such as conductometric titration and dead-stop titration, truly realizing on-demand configuration and multiple uses in one instrument. The instrument adopts an advanced Android 10 intelligent operating system and a 7-inch HD touch screen, offering intuitive and smooth operation. Core performance is outstanding, with titration repeatability ≤0.2%, and it supports real-time monitoring and compensation of multiple parameters such as potential, pH and temperature. With professional routine and dedicated dual titration modes built in, it flexibly meets R&D needs while efficiently completing standard testing and directly outputting sample content results. With a high-precision fluid control system, massive data storage, complete audit trail functions and multiple data interfaces, this series is an efficient analysis platform for laboratory quality control and scientific research.

II. Detection Principle

The detection of the automatic potentiometric titrator is based on the change of electrochemical parameters of the solution during titration; a high-precision sensor monitors in real time and intelligently determines the end point, realizing automated quantitative analysis. During titration, the potential difference (or pH value) between the indicating electrode and the reference electrode changes as titrant is added. The instrument continuously collects signals at a high resolution of 0.1 mV (or 0.001 pH), plots the potential-volume curve, and automatically identifies the jump or inflection point of the curve through an intelligent algorithm, thereby precisely determining the titration end point. It is suitable for the four major categories of titration reactions: acid-base, redox, precipitation and complexation. Through integrated sensors and an intelligent control system, the instrument automatically completes precise liquid addition, signal acquisition, data processing and end-point determination, ensuring high accuracy, high repeatability and ease of operation.

Conductometric titration determines the end point by monitoring the change in the conductivity of the solution. During titration, changes in ionic species and concentration cause significant changes in the conductivity of the solution. The instrument is equipped with a highly stable conductivity detection module that captures the conductivity turning point in real time, making it especially suitable for the titration of extremely weak acids/bases or the analysis of mixed systems.

Dead-stop titration adopts a dual platinum electrode system and, under a small constant applied polarization voltage, monitors the change in the current flowing through the electrode pair. Near the stoichiometric point, the generation or disappearance of a reversible redox couple causes a sudden change in current, which the instrument uses as the end-point indication signal. This method is highly sensitive and is particularly suitable for volumetric analysis based on the iodometric method, sodium nitrite method, etc.

Through the integrated sensors and intelligent control system described above, the instrument automatically completes precise liquid addition, signal acquisition, data processing and end-point determination, ensuring high accuracy, high repeatability and ease of operation.

III. Reference Standards

1. JJG 814-2015 "Verification regulation for automatic potentiometric titrators"

2. GB/T 29252-2012 "Quality inspection rules for laboratory instruments and equipment"

3. GB 4793.1-2007 "Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 1: General requirements"

IV. Application Range

With its comprehensive titration modules and high-precision measurement performance, the automatic potentiometric titrator is widely used in quality control and scientific research across many industries. In the field of food safety, it can be used to test the acid value and peroxide value of edible oils, the amino acid nitrogen in soy sauce and vinegar, and the acidity and alkalinity of various foods. In environmental monitoring, it is suitable for water quality analysis, such as the determination of chemical oxygen demand (COD), chloride ion and ammonia nitrogen. In the pharmaceutical and cosmetics industries, it can be used for the content determination of raw materials, monitoring of solution pH and conductivity, and cleaning validation. In the petrochemical field, it involves the acid value, base value and sulfur content of oil products as well as the purity analysis of chemical raw materials. In addition, in chemical teaching and experimental research at universities and research institutes, this instrument is likewise a reliable analysis tool that can meet various needs from basic titration to the study of complex systems, providing users with an accurate, efficient and flexible automated analysis solution.

V. Functional Features

VI. Technical Parameters