| 傅里叶变换-红外光谱法快速测定面粉中滑石粉 |
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| 引用本文： | 赵延华,韩旭. 傅里叶变换-红外光谱法快速测定面粉中滑石粉[J]. 理化检验(化学分册), 2011, 0(2) |
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| 作者姓名： | 赵延华 韩旭 |
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| 作者单位： | 辽宁省分析科学研究院辽宁省标准化体系建设工程技术研究中心; |
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| 摘 要： | 提出了应用衰减全反射(ATR)傅里叶变换-红外光谱(FT-IRS)法快速检测面粉中混入的滑石粉,测定中采用中红外检测器。根据滑石粉的标准红外光谱图并为避免面粉的吸收干扰,选择滑石粉在3 674.96 cm-1及668.16 cm-1两处的特征吸收峰作为判定面粉中是否含有滑石粉的依据,并且其吸收强度随滑石粉含量的增加而增加。由于面粉中滑石粉质量分数低于0.5%和0.2%时,分别在上述两吸收峰波长处已不呈现吸收,方法中将1%(质量分数)作为滑石粉的检出限。此外,根据吸收峰的吸收强度可估算出滑石粉的含量。方法中选用的主要仪器工作条件为:①扫描范围为4 000～650 cm-1;②分辨率为8 cm-1;③扫描信号累加次数为32;④衰减全反射压力常数为100。
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| 关 键 词： | 傅里叶变换红外光谱法 衰减全反射 面粉 滑石粉 |
Rapid Determination of Talc Powder in Flour by FT-IRS |
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| ZHAO Yan-hua,HAN Xu. Rapid Determination of Talc Powder in Flour by FT-IRS[J]. Physical Testing and Chemical Analysis Part B:Chemical Analgsis, 2011, 0(2) |
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| Authors: | ZHAO Yan-hua HAN Xu |
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| Affiliation: | ZHAO Yan-hua,HAN Xu(Liaoning Provincial Research Center of Engineering Technology for Establishment of Standardization System,Liaoning Provincial Research Institute of Analytical Science,Shenyang 110015,China) |
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| Abstract: | FT-IRS with attenuated total reflection(ATR) was applied to the rapid determination of talc powder illicitly mixed into flour.Medium IR detector was used in the analysis.By referring the standard IR spectra and considering the absorption interference of flour,2 of the 3 IR absorption peaks of talc powder,i.e.,the peaks at 3 674.96 cm-1 and 668.16 cm-1,were selected as the characteristic absorption peaks to determine whether talc powder was present or not in the sample.It was shown that when the content(w%) ... |
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| Keywords: | FT-IRS Attenuated total reflection(ATR) Flour Talc powder |
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