Related Experiment Video
Updated: Jun 28, 2026
04:48
Setup of Capillary Electrophoresis-Inductively Coupled Plasma Mass Spectrometry (CE-ICP-MS) for Quantification of Iron Redox Species (Fe(II), Fe(III))
Published on: May 4, 2020
Sequential determination of iron and titanium by flow-injection analysis.
M G Andrade1, S L Ferreira, B F Santos
1Instituto de Química, Universidade Federal de Bahia Salvador, Bahia 40210, Brazil.
Talanta
|October 1, 1992
Summary
A new flow-injection method enables sequential spectrophotometric determination of iron and titanium using 3,4 dihydroxybenzoic acid. This precise and efficient technique is suitable for analyzing titanium and iron in rock samples.
Area of Science:
- Analytical Chemistry
- Spectrophotometry
- Chemical Analysis
Background:
- Accurate determination of iron and titanium is crucial in geological and environmental analysis.
- Existing methods may suffer from interferences or require complex procedures.
- Development of rapid and precise analytical techniques is ongoing.
Purpose of the Study:
- To develop a sequential flow-injection method for simultaneous determination of iron and titanium.
- To utilize 3,4 dihydroxybenzoic acid as a chromogenic reagent for complex formation.
- To optimize the method for high sampling rates and low reagent consumption.
Main Methods:
- Flow-injection analysis (FIA) system with simultaneous sample and reagent injection.
- Spectrophotometric detection of iron and titanium complexes at 380 nm and 570 nm.
- Sequential measurement of absorbances for quantitative analysis.
Main Results:
- The method achieved a precision of approximately 2%.
- A sampling rate of about 50 samples per hour was obtained.
- Reagent consumption was minimized to 200 μL (0.50% solution) per sample.
- The method demonstrated robustness against interferences.
Conclusions:
- The developed flow-injection method provides a precise, rapid, and efficient means for sequential determination of iron and titanium.
- The method is suitable for the analysis of titanium and iron in complex matrices like rocks.
- This technique offers advantages in terms of speed, reagent economy, and reduced interferences.
