Analytical Techniques for Aluminum Detection in Environmental and Biological Samples

The quantification of aluminium in natural waters, industrial effluents and biological fluids has prompted the development of diverse analytical strategies. Optical spectrophotometry, including colourimetric assays and photoluminescent methods, offers straightforward instrumentation and rapid throughput, often relying on chromogenic reagents that form coloured or fluorescent complexes with Al3+. Electrochemical approaches such as anodic stripping voltammetry benefit from high sensitivity and on‐site applicability when combined with preconcentration schemes. Liquid phase microextraction and solid‐phase extraction extend detection limits by isolating aluminium from complex matrices. Advanced sensors utilising functionalised nanomaterials and ion‐selective membranes have further enhanced selectivity and stability for trace analysis. Inductively coupled plasma mass spectrometry remains a benchmark for multi‐element determination at ultra‐trace levels, providing low parts‐per‐trillion detection limits and isotope information. Overall, method choice balances sensitivity, sample preparation time, matrix interference, portability and cost, with growing emphasis on green chemistry and minimal reagent consumption. Practical applications range from monitoring chlor‐alkali brines and drinking water safety to assessing aluminium exposure in clinical specimens, reflecting global concerns over neurotoxicity and environmental pollution.

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Analytical Techniques for Aluminum Detection in Environmental and Biological Samples publication trend

The graph below shows the total number of articles in analytical techniques for aluminum detection in environmental and biological samples across all publications each year (not limited to Nature Index journals).

Technical terms

Anodic Stripping Voltammetry: Electroanalytical method in which metal ions are pre‐deposited on an electrode and then oxidatively stripped to produce a current proportional to concentration.

Liquid Phase Microextraction: Preconcentration technique that transfers analytes from an aqueous sample into a small volume of an immiscible solvent, enhancing detection sensitivity.

Eriochrome Cyanine R: An azo dye that forms coloured complexes with aluminium ions, widely used for spectrophotometric determination in saline and environmental matrices.

Nanomaterial Sensor: Analytical device employing engineered nanoparticles or nanotubes to increase electrode surface area, conductivity and selectivity for target ions.

Limit of Detection (LOD): Lowest concentration of an analyte that can be reliably distinguished from background noise under specified conditions.

References

1. Quantitative Determining of Ultra-Trace Aluminum Ion in Environmental Samples by Liquid Phase Microextraction Assisted Anodic Stripping Voltammetry. Sensors (2018).
2. Nanomaterial Sensing Advantages: Electrochemical Behavior, Optimization and Performance of f-MWCNTs/CS/PB/AuE towards Aluminum Ions (Al3+) in Drinking Water. Crystals (2023).
3. Selective Membrane Sensor for Aluminum Determination in Food Products, Real Samples and Standard Alloys. Membranes (2021).
4. Facile Determination of Aluminum Content in Industrial Brine by Investigating the Effects of Buffer Systems. ChemistryOpen (2024).
5. Green Photoluminescent Methodology for Aluminium Traces Quantification in 24-Hour Urine of Subjects with Different Exposition to Tobacco Smoke. American Journal of Analytical Chemistry (2018).