土壌中の特定のガドリニウム造影剤の測定:方法の妥当性確認と応用
A F Roig-Navarro1, F Soria-Prieto2, E Pitarch2
1Environmental and Public Health Analytical Chemistry, Research Institute for Pesticides and Water, Universitat Jaume I, Avgda. Sos Baynat, S/N, 12071, Castelló, Spain. roig@uji.es.
Analytical and bioanalytical chemistry
|February 11, 2026
まとめ
再生水灌漑のため、土壌中のガドリニウム造影剤(GBCA)の環境モニタリングは極めて重要である。本研究では、土壌中のGBCAを定量するための新しい方法を開発し、灌漑地域への蓄積を明らかにした。
科学分野:
- 環境化学;分析化学;環境科学
背景:
- 農業における再生水の使用は、ガドリニウム造影剤(GBCA)のような持続性化合物による土壌汚染のリスクをもたらします。;GBCAは下水処理ではほとんど除去されず、環境中に放出され、土壌や作物に蓄積する可能性があります。;土壌マトリックス中のGBCAを定量するための信頼できる分析方法が必要です。
研究 の 目的:
- 粘土土壌中のGBCA(ガドテリン酸、ガドテリドール、ガドブトロール)を測定するための堅牢な分析方法を開発し、妥当性を確認すること。;再生水で灌漑された土壌におけるGBCAの環境蓄積を評価すること。;GBCAの環境動態および潜在的な食物連鎖移行をモニタリングするためのツールを提供すること。
主な方法:
- イオンクロマトグラフィーと誘導結合プラズマ質量分析法(IC-ICP-MS)を組み合わせた方法の開発と妥当性確認。;7.5分以内の効率的なGBCA分離のための移動相および溶出条件の最適化。;抽出プロトコルの評価:生物利用可能な画分に対する穏やかな硝酸アンモニウム抽出と、定量的な回収のためのアルカリ性水酸化カリウム抽出。
主要な成果:
- 妥当性確認されたIC-ICP-MS法は、低い検出限界(LOD < 2 ng g⁻¹)と定量限界(LOQ < 5 ng g⁻¹)を達成しました。;本研究は、再生水で灌漑された農地および都市公園からの粘土土壌中のGBCAを初めて定量することに成功しました。;アルカリ抽出は、泥炭基質中のガドテリン酸に対して高い回収率(80%)を示し、灌漑された栽培試験におけるGBCAの蓄積を確認しました。
結論:
- 土壌中のGBCA測定のための信頼性が高く感度の高い方法が確立され、正確な環境モニタリングが可能になりました。;本研究結果は、再生水または Fortified water で灌漑された土壌および泥炭基質へのGBCAの蓄積を確認しました。;GBCAの環境への影響および食物連鎖への潜在的な移行を評価するためには、堅牢な分析ワークフローが不可欠です。
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