Scholarlink

<p>Concerns about sun exposure have increased, leading to increased interest in the quality of sunscreen products, particularly regarding their content of heavy metals that may pose a health risk. This study aims to evaluate the concentrations of some heavy metals in sunscreens using two analytical techniques: atomic absorption spectroscopy (AAS) and laser induced breakdown spectroscopy (LIBS), and to compare the results of both methods. Two commercial samples representing two different quality products were analyzed: a low-quality sample (R10) and a high-quality sample (R11). Sunscreen samples were dried at 55&#xa0;°C for 1&#xa0;h (before LIBS analysis) to remove excess moisture and to provide a stable plasma, as the sunscreen matrices had high contents of water and oil. Two computational methods were used to estimate element concentrations The first is an electron density method to determine the concentrations of elements such as Zn, Ni, Pb, Hg, and Cd. The second is a new method known as the relative density method (LIBS-Qc), a simplified method that does not rely on electron temperature and has proven highly efficient in calculating concentrations. The results showed that the mercury concentration was higher in sample R10 (11.083) than in sample R11 (6.607). The new method (LIBS-Qc) also showed good agreement with the results of the AAS technique, indicating its potential as an effective and rapid alternative for the analysis of heavy elements in commercial products.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Proposed novel relative intensity LIBS approach for quantifying heavy metals in sunscreens, compared with AAS

  • 期刊论文

  • 发表日期：

    2025年11月12日

查看全文
  • Rajaa Nader,
  • Muayyed Jabar Zoory,
  • Haidar J. Mohamad

摘要

Concerns about sun exposure have increased, leading to increased interest in the quality of sunscreen products, particularly regarding their content of heavy metals that may pose a health risk. This study aims to evaluate the concentrations of some heavy metals in sunscreens using two analytical techniques: atomic absorption spectroscopy (AAS) and laser induced breakdown spectroscopy (LIBS), and to compare the results of both methods. Two commercial samples representing two different quality products were analyzed: a low-quality sample (R10) and a high-quality sample (R11). Sunscreen samples were dried at 55 °C for 1 h (before LIBS analysis) to remove excess moisture and to provide a stable plasma, as the sunscreen matrices had high contents of water and oil. Two computational methods were used to estimate element concentrations The first is an electron density method to determine the concentrations of elements such as Zn, Ni, Pb, Hg, and Cd. The second is a new method known as the relative density method (LIBS-Qc), a simplified method that does not rely on electron temperature and has proven highly efficient in calculating concentrations. The results showed that the mercury concentration was higher in sample R10 (11.083) than in sample R11 (6.607). The new method (LIBS-Qc) also showed good agreement with the results of the AAS technique, indicating its potential as an effective and rapid alternative for the analysis of heavy elements in commercial products.