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目前的 FTIR 圖譜不支持從譜庫搜索中獲得確定的材料鑑定。雖然最近的譜庫條目是甲醇,但檢索置信度實際上為零,且更廣泛的前15名組在化學上不一致。觀測到的光譜更安全地描述為低置信度的含氧脂肪族材料,可能是簡單的醇或含醇混合物,依據是 3363 cm-1 附近的 O-H 伸縮譜帶、1020-1081 cm-1 的強 C-O 區域吸收,以及 2980 cm-1 附近的脂肪族 C-H 伸縮。1652 cm-1 附近的譜帶表明可能是吸收的水分、氫鍵效應,或額外的不飽和或雜質相關貢獻,這阻礙了狹窄的指派。
建議的下一步: Recollect the FTIR spectrum after careful drying and background correction to test whether the 1652 cm-1 band is due to absorbed water. Compare the sample against authenticated spectra of methanol and other low-molecular-weight alcohols under the same measurement conditions, focusing on the O-H band shape and the 1020-1081 cm-1 C-O region. Use GC-MS or headspace GC-MS if the sample is volatile, since that would quickly confirm or exclude a simple alcohol such as methanol. If the sample is a mixture or formulation, complementary NMR or targeted chromatography would help determine whether the hydroxyl-bearing component is the major constituent or only a minor additive.
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FTIR.fun
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