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FTIR證據不支持確定的化合物級別鑑定。譜庫匹配極弱,所有列出的候選項相似度為零,因此命名的頂級命中不能視為可靠分配。觀察到的1397-1417 cm-1波峰連同682和869 cm-1附近的強低波數特徵,更符合簡單的含氮或含碳酸鹽殘留物,而非特定鑑定的分子材料。由於乙腈出現在主要譜庫候選項中,腈類可能性仍然存在,但此處未報告預期的約2250 cm-1附近孤立強波峰。總體而言,最安全的結論是涉及小分子含氮無機或簡單有機殘留物的廣泛材料方向,可能具有硝酸鹽、碳酸鹽或腈類特徵,而非確認的單一物質。
建議的下一步: Re-acquire the FTIR spectrum with full band intensities and baseline correction, paying particular attention to the 2300-2200 cm-1 region for a nitrile band and the 1500-1300 cm-1 region for nitrate or carbonate line shape. Check for atmospheric or substrate contamination and repeat after a clean blank/background measurement, since the weak aliphatic C-H bands may reflect handling residue. If nitrate is suspected, verify with Raman or ion chromatography; if carbonate is suspected, test acid reactivity or confirm by XRD for an inorganic salt residue. If a volatile organic residue is possible, complement FTIR with GC-MS or headspace analysis to evaluate a small nitrile such as acetonitrile.
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FTIR.fun
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