FTIR在气体标准物质研究中的应用

王德发; 周枫然; 叶菁; 张体强; 曾武; 韩桥

doi:10.12338/j.issn.2096-9015.2020.9041

FTIR在气体标准物质研究中的应用

doi: 10.12338/j.issn.2096-9015.2020.9041

王德发^{1, 2,},
周枫然¹,
叶菁^{1, 2},
张体强^{1, 2},
曾武³,
韩桥¹

1.
中国计量科学研究院，北京 100029
2.
国家气体产品质量监督检验中心，北京 100029
3.
中计华量环境科技河北有限公司，石家庄 050000

基金项目: 国家重点研发计划（2016YFF0201101）；中国计量科学研究院基本科研业务费重点领域项目（AKYZD2008）

详细信息

作者简介:
王德发（1977-），中国计量科学研究院副研究员，研究方向：气体计量，邮箱：wangdf@nim.ac.cn

计量
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出版历程
- 网络出版日期: 2021-05-08
- 刊出日期: 2021-06-24

Application of FTIR in the Research on Gas Reference Materials

WANG Defa^{1, 2
,},
ZHOU Fengran¹,
YE Jing^{1, 2},
ZHANG Tiqiang^{1, 2},
ZENG Wu³,
HAN Qiao¹

1.
National Institute of Metrology, Beijing 100029, China
2.
National Center for Quality Supervision and Inspection on Gas Products, Beijing 100029, China
3.
Zhongjihualiang Environmental Technology Hebei Co., Ltd., Shijiazhuang 050000, China

摘要

摘要: 气体标准物质在气体测量领域有广泛的应用，为实现测量结果溯源至国际单位制SI发挥了重要的作用。在气体标准物质研制过程中离不开气体成分的测量，测量方法除了色谱法、质谱法外，光谱法也被广泛应用。傅里叶变换红外光谱（FTIR）是一种光谱测量技术，它可以用于原料气体的纯度分析和气体标准物质特性组分和干扰组分的精确测量。介绍了采用FTIR测量几种原料气体中杂质的应用实例，以及在气体标准物质量值测量和国际比对中的一些应用。研究显示FTIR比较适用于活泼性组分的测量和多组分的同步测量，测量过程操作相对简单，不需要像GC或GCMS那样对色谱柱或者色谱参数进行复杂的优化和控制；FTIR同样适用于稳定性气体的测量，例如在温室气体测量中也可以获得较高的重复性和准确性。除此之外，准确的测量结果与所使用的校准方法有关，使用单点精确匹配校准或双点校准，同时采用“参考-样品-参考”的交替测量序列，可以获得相对准确的测量结果。
- 气体 /
- 标准物质 /
- 傅里叶变换红外光谱 /
- 纯度 /
- 目标组分 /
- 测量 /
- 校准
Abstract: Gas reference materials are widely used in gas measurement and play an important role in achieving traceability of measurement results to the SI units. The measurement of gas composition is indispensable in the development of gas reference materials. Besides chromatography and mass spectrometry, spectroscopy is also widely used. Fourier Transform infrared spectroscopy (FTIR) is a spectrum measurement technology that can be used for purity analysis of raw gases and accurate measurement of characteristic components and interference components of gas reference materials. This paper introduces the applications of FTIR in the measurement of impurities in several kinds of raw gases, and some applications in the property value measurement and international comparison of gas reference materials. The results show that FTIR is more suitable for the measurement of active components and simultaneous measurement of multiple components. The operation of the measurement process is relatively simple and does not require complex optimization and control of the chromatographic column or chromatographic parameters as in GC or GCMS. FTIR is also suitable for the measurement of stable gases. For example, it can obtain high repeatability and accuracy in the measurement of greenhouse gases. This paper points out that the accurate measurement results are related to the calibration method used, and relatively accurate measurement results can be obtained by using single-point exact-match calibration or two-point calibration, with an alternating measurement sequence “reference-sample-reference”.
- gas /
- reference material /
- Fourier Transform infrared spectroscopy /
- purity /
- target component /
- measurement /
- calibration

HTML全文

图 1 FTIR测量一氧化氮纯气的典型谱图

Figure 1. Typical spectrogram of NO pure gas measurement by FTIR

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图 2 高浓度二氧化氮气体的FTIR测量谱图

Figure 2. FTIR spectrogram of high concentration NO₂

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图 3 硫化氢纯气FTIR测量结果的比较

Figure 3. Comparison of FTIR measurement results of H₂S pure gas

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图 4 COS纯气的FTIR测量典型谱图

Figure 4. Typical spectrogram of COS pure gas measurement by FTIR

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图 5 GCMS法测量三瓶CF₄纯气的典型谱图

Figure 5. Typical chromatogram of CF₄ pure gas in three cylinders by GCMS measurement

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图 6 FTIR法测量三瓶CF₄纯气的典型谱图

Figure 6. Typical spectrogram of CF₄ pure gas in three cylinders by FTIR measurement

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图 7 FTIR测量甲醛标准气体的典型谱图

Figure 7. Typical spectrogram of HCHO standard gas measurement by FTIR

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表 1 各类校准函数推荐的校准点最少数量

Table 1. The minimum calibration point recommended for calibration functions

校准函数类型推荐的校准点最少数量

线性函数 3
二次多项式 5
三次多项式 7
幂函数 5
指数函数 5

下载: 导出CSV

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