Related Experiment Video
Updated: May 8, 2026
09:07
Direct Microbial Identification using An Automated Microbial Identification System to Facilitate the EUCAST RAST Method Without Mass Spectrometry
Published on: May 24, 2024
A spectrophotometric flow injection system for streptomycin determination in veterinary samples
Pedro Marcos Frugeri1, Ayla Campos do Lago, Célio Wisniewski
1Universidade Federal de Alfenas (UNIFAL-MG), Instituto de Química, Rua Gabriel Monteiro da Silva, 714, CEP 37130-000 Alfenas, MG, Brazil.
Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
|September 4, 2013
Summary
A new spectrophotometric flow injection analysis method simplifies streptomycin determination in veterinary samples. This rapid, accurate technique requires no sample preparation, offering a viable alternative for antibiotic residue analysis.
Area of Science:
- Analytical Chemistry
- Veterinary Science
- Spectrophotometry
Background:
- Streptomycin is a crucial antibiotic in veterinary medicine.
- Accurate determination of streptomycin in veterinary samples is essential for ensuring animal health and food safety.
- Existing methods for streptomycin analysis can be complex and time-consuming.
Purpose of the Study:
- To develop and optimize a spectrophotometric flow injection analysis (FIA) system for rapid streptomycin determination.
- To validate the proposed method for its accuracy and precision in veterinary samples.
- To offer a simplified analytical approach for streptomycin quantification.
Main Methods:
- A flow injection analysis system was designed for streptomycin detection.
- The method involves alkaline hydrolysis of streptomycin to guanidine, followed by reaction with Fe(II) to form a colored product.
- Chemometrics tools, including factorial design and Doehlert design, were employed for system optimization.
- Spectrophotometric detection was performed at an absorption peak of 520 nm.
Main Results:
- The optimized FIA system demonstrated a linear range of 60 to 1000 mg L(-1) and a limit of detection of 18 mg L(-1).
- The system achieved a sampling rate of 36 readings per hour with a coefficient of variation (CV) less than 6.5% for veterinary samples.
- Accuracy was confirmed through comparison with High-Performance Liquid Chromatography (HPLC), showing agreement (t-test, p=0.05).
- No sample preparation was required, as veterinary samples were diluted in water.
Conclusions:
- The proposed spectrophotometric flow injection analysis method is a sensitive, precise, and accurate technique for streptomycin determination in veterinary samples.
- The method's simplicity and speed, requiring no sample preparation, make it suitable for routine analysis.
- This FIA system provides a valuable tool for quality control and residue monitoring in veterinary medicine.
