Automatic Potentiometric Titrator LPTT-T2021

Introduction

Automatic Potentiometric Titrator offers a temperature resolution of 0.01°C, providing precise control of reaction temperatures during titration processes. It has an automatic calibration mode to ensure accurate and reliable measurements. The control unit is powered by a high-performance microprocessor that manages all functions of the titration process. Our automatic potentiometric titrator features high-quality electrodes, delivering accurate measurements over a wide range of sample conditions.

This potentiometric titrator is designed to meet the rigorous requirements of modern laboratory operations, ensuring high precision, reliability, and ease of use for various experimental applications.

Applications

Automatic Potentiometric Titrator measures changes in the electrical potential to detect the endpoint. It is widely used in biochemical analysis, petrochemical analysis, electroplating and research laboratories for precise quantitative determinations.

Specifications

Measuring Range	2000.0 mV to +2000.0 Mv -20.000 pH to +20.000 pH
Measurement Resolution	0.1 mV
Measurement Precision	0.1 mV ± 0.03%
Measurement Mode	: Measuring pH / mV/T : pH correction (multi-point) Setting end-point mode Equivalent titrating Dynamic titrating
pH Resolution	0.001 pH
pH Precision	0.003 pH
Titrating Volume Accuracy	0.001ml
Titrating Method	Acid-base titration, redox titration, precipitation titration, complexation titration, non-water titration
Titrating Cup Capacity	250 ml
Temperature Measurement Range	-5 to 120° C
Temperature Resolution	0.01° C
Temperature Measurement Accuracy	±0.1° C
Communication Mode	1 , 232 serial port, ethernet
Fluid Adding Unit	Built-in liquid-adding unit
Liquid-Adding Module Unit	Contains 2 sets of built-in titration liquid-adding channel.
Number of liquid-adding channels	8 channels
Burette Model	1ml, 5ml, 10ml, 25ml, 50ml (10ml standard)
Burette Resolution	1/48000
Time of Replenishing Liquid	10 sec
Control Unit	PC including software
Automatic Sampler	It is compatible with GT robot injection system for mass sample analysis.
Self -Checking Function	Power-on to automatically check the instrument status.
Calibration Function	Yes
Storage Space	> 300G (more than 10000 )
Preset Method	>300G (more than 10000 )
Pipelines	titration pipelines
Valve	Roof type spiral stirrer or magnetic stirring.
Microscale Detection Electrodes	Imported
Micro-Injection Pump	Imported

Features

Interchangeable Burette System

High mV Resolution

Overhead Stirring Coil

Integrated Mixing Apparatus

Automatic Cleaning Operation

FAQs

1. How does an automatic potentiometric titrator enhance accuracy and repeatability in analysis?

automatic potentiometric titrator improves accuracy by automating titrant addition, electrode potential measurement, and endpoint detection. Unlike manual titrations, it eliminates parallax errors and subjective color change judgments. This automation ensures that each titration is carried out with identical parameters, improving repeatability. Sophisticated microprocessors in the automatic potentiometric titrator analyze titration curves and calculate exact concentrations. Temperature compensation and calibration protocols further ensure analytical precision. The closed system prevents contamination and minimizes sample exposure. Built-in data logging also allows traceability and validation of results. This makes it suitable for critical applications requiring stringent quality control.

2. What types of titrations can be performed with an automatic potentiometric titrator ?

automatic potentiometric titrator supports a wide variety of titrations, including acid-base, redox, precipitation, and complexometric titrations. It can also be used for non-aqueous titrations, especially in pharmaceutical and petrochemical analysis. For redox titrations, it monitors potential shifts due to electron transfer reactions. In acid-base titrations, it detects sharp voltage changes around the equivalence point. The automatic potentiometric titrator is also compatible with ion-selective electrodes for specific ions. Its flexible programming allows multi-step titrations and derivative curve analysis. Each titration type benefits from the instrument’s high sensitivity and automated control. This versatility makes it an essential lab asset.

3. Which types of titrations can be performed using an automatic potentiometric titrator ?

Automatic potentiometric titrators -A 21 are versatile instruments capable of performing a wide range of titration types. These include acid-base titrations, where pH changes are monitored to determine the endpoint. Redox titrations involve electron transfer reactions, with potential changes indicating the equivalence point. Complexometric titrations, often used for metal ion analysis, rely on the formation of complexes between the analyte and titrant. Precipitation titrations detect the formation of an insoluble compound during the reaction. Non-aqueous titrations are conducted in solvents other than water, suitable for substances insoluble or unstable in water. Ion-selective electrode () titrations target specific ions using selective membranes. This broad applicability makes automatic potentiometric titrators essential tools in various analytical laboratories.

4. How do first and second derivative methods optimize endpoint detection?

Derivative titration methods calculate the slope (1st derivative) or curvature (2nd derivative) of the potential-volume curve to identify the sharpest change corresponding to the equivalence point. The 1st derivative is useful for single-endpoint titrations, where the inflection point yields maximum slope. The 2nd derivative flags multiple equivalence points or closely spaced endpoints by highlighting zero-crossings in the curvature plot. Users can set sensitivity thresholds to filter noise, avoiding false endpoints in low-signal titrations. Advanced software allows overlaying derivative curves in real time, enabling method developers to fine-tune dosing increments. Pre-titration smoothing algorithms (e.g., Savitzky–Golay filters) can be applied to raw data for cleaner derivative profiles. For complexometric titrations with gradual potential changes, derivative methods improve precision over fixed-pH endpoints. Documentation of derivative parameters ensures reproducibility across operators and shifts.

5. What are common error sources in automatic potentiometric titrator and how can they be mitigated?

Complexometric titrations often suffer from metal-ion hydrolysis or slow complex formation, leading to endpoint overshoot if the dosing rate is too high. Slowing pump speed near the anticipated endpoint and using incremental dosing improves accuracy. Non-aqueous titrations can be affected by solvent moisture content; pre-dry solvents and titrants over molecular sieves for at least 24 hours. Use a non-aqueous reference electrode compatible with low-dielectric solvents to maintain stable potentials. Implement automatic solvent addition routines to keep the sample volume constant and minimize concentration drift. Complexometric buffers must be titrated for pH control; verify buffer capacity and adjust before sample analysis. Regularly inspect and replace sealing O-rings on burettes to prevent air ingress during slow titrations. Validate methods by performing spike-recovery tests to detect matrix interferences