



摘要:原子熒光光譜法作為一種高選擇性的分析技術,在土壤重金屬測定中具有重要的應用價值。基于此,介紹原子熒光光譜法的基本原理,詳細闡述該方法在砷、汞等重金屬元素測定中的應用實例。研究結果表明,原子熒光光譜法的準確性較高,測得的結果與標準值非常接近,適用于復雜土壤基質中微量重金屬的精確測定,能有效優化檢測流程,提高檢測精度。
關鍵詞:原子熒光光譜法;土壤重金屬;生態環境監測;檢測限
中圖分類號:X833 文獻標識碼:A 文章編號:1008-9500(2024)09-0-03
40
Application of Atomic Fluorescence Spectroscopy in Soil Heavy Metal Determination
GUO Qiyao
(Guangzhou Building Materials Institute Limited Company, Guangzhou 510000, China)
Abstract: Atomic fluorescence spectroscopy, as a highly selective analytical technique, has important application value in the determination of heavy metals in soil. Based on this, the basic principle of atomic fluorescence spectroscopy is introduced, and the application examples of this method in the determination of heavy metal elements such as arsenic and mercury are elaborated in detail. The research results indicate that atomic fluorescence spectroscopy has high accuracy, and the measured results are very close to the standard values. It is suitable for precise determination of trace heavy metals in complex soil matrices, and can effectively optimize the detection process and improve detection accuracy.
Keywords: atomic fluorescence spectroscopy; soil heavy metals; ecological environment monitoring; detection limit
隨著城市化進程的不斷加快,土壤污染問題日益凸顯。重金屬污染因具有持久性、積累性等特性,受到高度關注。如果鉛、鎘、汞、砷等重金屬進入土壤,會影響土壤的生態功能,甚至威脅人類健康。因此,準確測定土壤中的重金屬含量,對于生態環境監測具有重要意義。原子熒光光譜法是一種靈敏度高、選擇性好的分析技術,已廣泛應用于土壤重金屬測定領域。與傳統原子吸收光譜法(Atomic Absorption Spectroscopy,AAS)和電感耦合等離子體發射光譜法相比,原子熒光光譜法具有檢出限低、干擾少、操作簡便等優點,適合于檢測痕量重金屬。在生態環境監測中,土壤重金屬測定要綜合考慮方法的準確性、樣品代表性、分析效率,而原子熒光光譜法全部滿足這些要求。
1 原子熒光光譜法的原理
在原子熒光光譜法應用過程中,首先將樣品溶解在溶劑中,通過火焰、電熱石墨爐、微波消解等方式將溶液轉化為氣態原子。……