Magnetite-based SPME-SQT-FAAS for trace chromium determination in rice
Abstract
Rice, an essential carbohydrate and nutrient source grown in aquatic environments, is a staple food globally. Due to the high toxicity of chromium (Cr), monitoring its trace levels in agricultural products is critical for human health. In this study, Total Cr concentrations were determined in two distinct rice varieties: Karacadağ rice (Turkey) and Baldo rice (Italy). A novel Magnetic Solid-Phase Extraction (MSPE) protocol using oleic acid-coated magnetic nanoparticles (OAMNPs) was developed and coupled with slotted quartz tube flame atomic absorption spectrometry (SQT-FAAS) for trace chromium quantification. Following systematic optimization of key operational parameters such as sample pH, eluent and buffer volumes, and magnetic nanoparticle (MNP) dosage, the method yielded a limit of detection (LOD) of 1.30 µg/L, a limit of quantification (LOQ) of 4.33 µg/L, and a linear range of 5–100 µg/L (R ² = 0.9989), delivering a remarkable enhancement factor of 104.78. High precision was confirmed with a relative standard deviation (RSD) of 5.78%. The method demonstrated excellent accuracy and robustness, supported by recovery values ranging between 93 and 105% in the presence of common interfering ions. These quantitative outcomes underscore that the developed analytical platform is highly sensitive, precise, and efficient for monitoring trace chromium in complex food matrices. Methodological accuracy and robustness were successfully validated through recovery assays. These outcomes underscore that the proposed OAMNP- MSPE-SQT-FAAS framework represents a highly sensitive, precise, and efficient analytical platform for detecting trace chromium within complex matrices.
Related
- A novel hydrophobic deep eutectic solvent-based paired-drop microextraction method for the trace determination of metribuzin in urine samples
- Highly sensitive square-wave anodic stripping voltammetry at H-terminated BDD for ultra-trace fomesafen determination in water and soil
- Response surface methodology-optimized mildly carboxylated cellulose for dispersive solid-phase extraction and trace determination of heavy metals in commercial beverages.
- Volatilome Characterization of the Flat White Onion of Fara Filiorum Petri (Allium cepa L.) and Its Differentiation from Other Italian White Onions by HS-SPME-GC-MS
- Rethinking Solid-Phase Microextraction (SPME) for Bioanalysis: Workflow Optimisation in Automated Vacuum-Assisted Cooling SPME for Fatty Acid Monitoring in Faecal Waters
BibTeX
@article{uzan2026magnetitebased,
title = {{Magnetite-based SPME-SQT-FAAS for trace chromium determination in rice}},
author = {Sevda Hünür Uzan and Fırat Aydin and Mehmet Aslan},
journal = {Scientific Reports},
year = {2026},
month = oct,
doi = {10.1038/s41598-026-76252-y},
url = {https://www.nature.com/articles/s41598-026-76252-y},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Magnetite-based SPME-SQT-FAAS for trace chromium determination in rice
AU - Sevda Hünür Uzan
AU - Fırat Aydin
AU - Mehmet Aslan
PY - 2026
DA - 2026/10/20
JO - Scientific Reports
DO - 10.1038/s41598-026-76252-y
UR - https://www.nature.com/articles/s41598-026-76252-y
AB - Rice, an essential carbohydrate and nutrient source grown in aquatic environments, is a staple food globally. Due to the high toxicity of chromium (Cr), monitoring its trace levels in agricultural products is critical for human health. In this study, Total Cr concentrations were determined in two distinct rice varieties: Karacadağ rice (Turkey) and Baldo rice (Italy). A novel Magnetic Solid-Phase Extraction (MSPE) protocol using oleic acid-coated magnetic nanoparticles (OAMNPs) was developed and coupled with slotted quartz tube flame atomic absorption spectrometry (SQT-FAAS) for trace chromium quantification. Following systematic optimization of key operational parameters such as sample pH, eluent and buffer volumes, and magnetic nanoparticle (MNP) dosage, the method yielded a limit of detection (LOD) of 1.30 µg/L, a limit of quantification (LOQ) of 4.33 µg/L, and a linear range of 5–100 µg/L (R ² = 0.9989), delivering a remarkable enhancement factor of 104.78. High precision was confirmed with a relative standard deviation (RSD) of 5.78%. The method demonstrated excellent accuracy and robustness, supported by recovery values ranging between 93 and 105% in the presence of common interfering ions. These quantitative outcomes underscore that the developed analytical platform is highly sensitive, precise, and efficient for monitoring trace chromium in complex food matrices. Methodological accuracy and robustness were successfully validated through recovery assays. These outcomes underscore that the proposed OAMNP- MSPE-SQT-FAAS framework represents a highly sensitive, precise, and efficient analytical platform for detecting trace chromium within complex matrices.
SN - 2045-2322
ER -