Volume 17, Issue 3 (12-2024)
ijhe 2024, 17(3): 479-496 |
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Amoozadeh A, Saghafi H. Synthesized modified silica gel for extraction and pre-concentration process of ultra trace amounts of lead (II) ion in lettuce and water samples, using solid phase extraction method. ijhe 2024; 17 (3) :479-496
URL: http://ijhe.tums.ac.ir/article-1-6878-en.html
URL: http://ijhe.tums.ac.ir/article-1-6878-en.html
1- Department of Chemistry, Faculty of Science, Semnan University, Semnan, Iran
2- Department of Chemistry, Faculty of Science, Semnan University, Semnan, Iran ,h.saqafi@gmail.com
2- Department of Chemistry, Faculty of Science, Semnan University, Semnan, Iran ,
Abstract: (51 Views)
Background and Objective: In recent decades, the issue of crop product safety has led to develop methods for analyzing pollutants in crops. In the present study, ultra-trace amounts of lead (II) ions were measured in lettuce and water samples collected from Shahmirzad, located in Semnan province, an area known for its lead-containing mineral mines.
Materials and Methods: After sampling and pre-preparation, the lead content in each sample was extracted using solid phase extraction with modified silica gel. The recovery percentage of lead was then determined using atomic absorption spectroscopy.
Results: Optimization of key parameters such as pH, adsorbent amount, analyte flow rate, and volume resulted in a recovery rate of 104%. The experiments also demonstrated a very low limit of detection (LOD) of 1.14 ng/mL, a concentration factor of 250, high analyte selectivity of the adsorbent in the presence of interfering ions, and a high adsorbent capacity of 2.93 μg/g.
Conclusion: The evaluation of experimental data indicates that the current study provides a highly selective method that can be applied to the extraction and recovery of various analytes from different sample types.
Materials and Methods: After sampling and pre-preparation, the lead content in each sample was extracted using solid phase extraction with modified silica gel. The recovery percentage of lead was then determined using atomic absorption spectroscopy.
Results: Optimization of key parameters such as pH, adsorbent amount, analyte flow rate, and volume resulted in a recovery rate of 104%. The experiments also demonstrated a very low limit of detection (LOD) of 1.14 ng/mL, a concentration factor of 250, high analyte selectivity of the adsorbent in the presence of interfering ions, and a high adsorbent capacity of 2.93 μg/g.
Conclusion: The evaluation of experimental data indicates that the current study provides a highly selective method that can be applied to the extraction and recovery of various analytes from different sample types.
Type of Study: Research |
Subject:
WATER
Received: 2023/12/12 | Accepted: 2024/09/15 | Published: 2024/12/11
Received: 2023/12/12 | Accepted: 2024/09/15 | Published: 2024/12/11
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