CN101975749B - Solid-film type formaldehyde standard distribution sample for testing formaldehyde accuracy in detection environmental chamber - Google Patents
Solid-film type formaldehyde standard distribution sample for testing formaldehyde accuracy in detection environmental chamber Download PDFInfo
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- CN101975749B CN101975749B CN2010105233480A CN201010523348A CN101975749B CN 101975749 B CN101975749 B CN 101975749B CN 2010105233480 A CN2010105233480 A CN 2010105233480A CN 201010523348 A CN201010523348 A CN 201010523348A CN 101975749 B CN101975749 B CN 101975749B
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 153
- 238000012360 testing method Methods 0.000 title claims abstract description 17
- 238000009826 distribution Methods 0.000 title claims description 4
- 238000001514 detection method Methods 0.000 title claims description 3
- 230000007613 environmental effect Effects 0.000 title abstract description 19
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 20
- 239000010935 stainless steel Substances 0.000 claims abstract description 20
- 239000012528 membrane Substances 0.000 claims abstract description 18
- 229930040373 Paraformaldehyde Natural products 0.000 claims abstract description 12
- 229920002866 paraformaldehyde Polymers 0.000 claims abstract description 11
- 239000007787 solid Substances 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 5
- -1 polytetrafluoroethylene Polymers 0.000 claims description 10
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 9
- 239000010410 layer Substances 0.000 claims description 5
- 239000002356 single layer Substances 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000012417 linear regression Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002798 spectrophotometry method Methods 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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Abstract
本发明涉及检测环境舱测试甲醛准确性的固-膜式甲醛标准散发样品，属于室内环境检验领域。该样品包括上端敞开的柱形盘状容器、置于容器中的多聚甲醛固体、置于该柱形盘状容器上端面的不锈钢筛网及固定不锈钢筛网的密封装置。本发明的固-膜式甲醛标准散发样品结构简单，价格低廉，可直接在室内环境下使用，具有恒定的甲醛散发速率及较高的散发精度。
The invention relates to a solid-membrane formaldehyde standard emission sample for testing the accuracy of formaldehyde in an environmental chamber, and belongs to the field of indoor environment testing. The sample comprises a cylindrical disc-shaped container with an open upper end, a paraformaldehyde solid placed in the container, a stainless steel screen placed on the upper end of the cylindrical disc-shaped container and a sealing device for fixing the stainless steel screen. The solid-membrane formaldehyde standard emission sample of the present invention has a simple structure and low price, can be directly used in an indoor environment, and has a constant formaldehyde emission rate and high emission accuracy.
Description
技术领域 technical field
本发明属于室内环境检验领域，特别涉及用于检测环境舱测试甲醛准确性的固-膜式甲醛标准散发样品。The invention belongs to the field of indoor environment inspection, in particular to a solid-membrane formaldehyde standard emission sample used for detecting the accuracy of formaldehyde in an environmental chamber test.
背景技术 Background technique
在现代建筑的室内空气中，日益严重的甲醛污染已成为影响人民生产效率、生活质量，乃至于生命安全的重要因素。室内甲醛污染主要来源于使用了人造板材的木质家具中含有的甲醛散发。为了评价整件木家具的甲醛散发水平，国内外一般采用全尺寸环境舱测试系统对木家具整体进行测试。为获得准确的检测结果，首先要对环境舱测试甲醛准确性进行检验。已有的一种用于检测环境舱综合性能的标准散发样品及其检测方法(专利申请号：201010202563.0)为液-膜式结构，采用聚四氟乙烯圆柱形筒体，内盛放化学分析纯VOC液体，筒口用阻隔层密封的结构，能有效防止液体的泄露，对极易挥发液体的散发有较大的阻隔作用，能很好的作为化学分析纯VOC液体的标准散发样品。但是在一个大气压的室温环境下不存在化学分析纯甲醛液体，而阻隔层对其它甲醛释放源(如多聚甲醛)散发的抑制作用过大，且筒体结构垂直高度深，内部空气的甲醛扩散传质阻力会进一步降低多聚甲醛的散发速率，因而这种适用于极易挥发的化学分析纯VOC液体的标准散发样品，不能推广到甲醛标准散发样品。而另一种可用于检验环境舱测试甲醛准确性的散发源，如标准气体发生器，需要将散发源加热到高温环境下发生，因而需要配备一套加热与控温装置，系统复杂，价格昂贵，不利于工程推广应用。In the indoor air of modern buildings, the increasingly serious formaldehyde pollution has become an important factor affecting people's production efficiency, quality of life, and even life safety. Indoor formaldehyde pollution mainly comes from the formaldehyde emission contained in wooden furniture using artificial panels. In order to evaluate the formaldehyde emission level of the whole piece of wooden furniture, a full-scale environmental chamber test system is generally used at home and abroad to test the whole wooden furniture. In order to obtain accurate test results, the accuracy of the formaldehyde test in the environmental chamber must first be checked. An existing standard distribution sample and its detection method (patent application number: 201010202563.0) for testing the comprehensive performance of the environmental chamber is a liquid-membrane structure, using a polytetrafluoroethylene cylindrical cylinder, containing chemical analysis pure For VOC liquid, the cylinder mouth is sealed with a barrier layer, which can effectively prevent liquid leakage and has a greater barrier effect on the emission of highly volatile liquids. It can be used as a standard emission sample for chemical analysis of pure VOC liquids. However, there is no chemical analysis of pure formaldehyde liquid at room temperature at an atmospheric pressure, and the barrier layer has an excessive inhibitory effect on the emission of other formaldehyde release sources (such as paraformaldehyde), and the vertical height of the cylinder structure is deep, and the formaldehyde in the internal air diffuses. Mass transfer resistance will further reduce the emission rate of paraformaldehyde, so this standard emission sample suitable for highly volatile chemical analysis of pure VOC liquids cannot be extended to formaldehyde standard emission samples. And another emission source that can be used to test the accuracy of formaldehyde in the environmental chamber, such as a standard gas generator, needs to heat the emission source to a high temperature environment, so it needs to be equipped with a heating and temperature control device, the system is complex and expensive , is not conducive to engineering promotion and application.
发明内容 Contents of the invention
本发明的目的是要克服已有的散发源对检测环境舱测试甲醛准确性的不足，提出一种用于检测环境舱测试甲醛准确性的固-膜式甲醛标准散发样品，本发明的固-膜式甲醛标准散发样品结构简单，价格低廉，可直接在室内环境下使用，具有恒定的甲醛散发速率及较高的散发精度。The purpose of the present invention is to overcome the deficiencies of existing sources of emission to the accuracy of formaldehyde testing in environmental chambers, and propose a solid-membrane formaldehyde standard emission sample for detecting the accuracy of formaldehyde in environmental chambers. Solid-film formaldehyde of the present invention The film-type formaldehyde standard emission sample has a simple structure and low price, and can be used directly in an indoor environment. It has a constant formaldehyde emission rate and high emission accuracy.
为实现上述目的，本发明提出的用于检测环境舱测试甲醛准确性的固-膜式甲醛标准散发样品，其特征在于，该样品包括上端敞开的柱形盘状容器、置于容器中的多聚甲醛固体、置于该柱形盘状容器上端面的不锈钢筛网及固定不锈钢筛网的密封装置。In order to achieve the above object, the solid-membrane formaldehyde standard emission sample that is used to detect the accuracy of formaldehyde in the environmental chamber test that the present invention proposes is characterized in that the sample includes a cylindrical disc-shaped container with an open upper end, a plurality of containers placed in the container Polyoxymethylene solids, a stainless steel screen placed on the upper end of the cylindrical disc-shaped container and a sealing device for fixing the stainless steel screen.
本发明的特点及效果：Features and effects of the present invention:
本发明的固-膜式甲醛标准散发样品，采用多聚甲醛固体与不锈钢筛网的组合构造恒定速率的散发源，该固-膜式甲醛标准散发样品的散发面为不锈钢筛网所处端面，利用不锈钢筛网网孔致密，透气性优良的特点，可以有效的将多聚甲醛固体封闭在柱形盘状容器中，同时不对多聚甲醛固体在室内环境下的自然分解散发产生较大的阻力。The solid-membrane formaldehyde standard emission sample of the present invention adopts a combination of paraformaldehyde solid and stainless steel screen to construct a constant rate emission source, and the emission surface of the solid-membrane formaldehyde standard emission sample is the end face where the stainless steel screen is located. Utilizing the characteristics of dense mesh and excellent air permeability of stainless steel mesh, it can effectively seal the paraformaldehyde solid in the cylindrical disc-shaped container, and at the same time, it will not produce great resistance to the natural decomposition and emission of paraformaldehyde solid in the indoor environment. .
附图说明 Description of drawings
图1为本发明的固-膜式甲醛标准散发样品结构示意图。Fig. 1 is the solid-membrane formaldehyde standard emission sample structural representation of the present invention.
图2为本发明的固-膜式甲醛标准散发样品使用时实测的质量线性衰减曲线。Fig. 2 is the mass linear attenuation curve actually measured when the solid-membrane formaldehyde standard emission sample of the present invention is used.
具体实施方式 Detailed ways
本发明提出的一种用于检测环境舱测试甲醛准确性的固-膜式甲醛标准散发样品，结合附图及实施例详细说明如下：A kind of solid-membrane formaldehyde standard distribution sample that is used to detect the accuracy of formaldehyde in the environmental cabin test proposed by the present invention is described in detail in conjunction with the accompanying drawings and embodiments as follows:
本发明的标准散发样品，为固-膜式甲醛标准散发样品，其结构如图1所示，该样品包括上端敞开的柱形盘状容器1(可采用不吸附不扩散甲醛的材料如不锈钢、聚四氟乙烯、玻璃等制造而成)、置于容器中的多聚甲醛固体2、置于该柱形盘状容器上端面的单层或多层不锈钢筛网3及固定不锈钢筛网的密封装置。The standard distributing sample of the present invention is solid-film formaldehyde standard distributing sample, and its structure is as shown in Figure 1, and this sample comprises the columnar disc container 1 that upper end is open (can adopt the material that does not absorb and diffuse formaldehyde such as stainless steel, polytetrafluoroethylene, glass, etc.), the paraformaldehyde solid 2 placed in the container, the single-layer or multi-layer stainless steel screen 3 placed on the upper end of the cylindrical disc-shaped container and the seal of the fixed stainless steel screen device.
密封装置由放置在不锈钢筛网上下面的两片聚四氟乙烯垫圈片41，套于两片聚四氟乙烯垫圈片外，并与柱形盘状容器1螺纹连接的顶部镂空瓶盖42构成，该瓶盖采用不吸附不扩散甲醛的材料(如不锈钢、聚四氟乙烯、玻璃等)制造，将该两片聚四氟乙烯垫片压紧在所述柱形盘状容器上端面。The sealing device consists of two
为使得该固-膜式甲醛标准散发样品的散发速率与实际家具的甲醛散发水平相当，该样品采用的柱形盘状容器1的外径为Φ65mm-Φ75mm，高为8mm-12mm，不锈钢筛网3为单层或多层，筛网总有效孔径为100μm-150μm。In order to make the emission rate of the solid-film formaldehyde standard emission sample comparable to the emission level of the actual furniture, the columnar disc container 1 used in the sample has an outer diameter of Φ65mm-Φ75mm, a height of 8mm-12mm, and a stainless steel screen. 3 is single-layer or multi-layer, and the total effective aperture of the screen is 100μm-150μm.
初始多聚甲醛固体2的充入高度为柱形盘状容器高度的9/10。The filling height of the
本实施例的样品采用的柱形盘状容器1的尺寸为Φ71mm(外径)×10mm(高)，不锈钢筛网3为单层，筛网有效孔径为100μm，初始多聚甲醛固体2的充入高度为9mm。The size of the cylindrical disk-shaped container 1 that the sample of the present embodiment adopts is Φ71mm (outer diameter) * 10mm (high), the stainless steel screen cloth 3 is a single layer, and the effective aperture of the screen cloth is 100 μm, and the filling of the initial paraformaldehyde solid 2 The entry height is 9mm.
本发明的工作原理：Working principle of the present invention:
本发明提出的一种用于检测环境舱测试甲醛准确性的固-膜式甲醛标准散发样品，具有恒定的散发速率，本发明在环境舱测试环境下实测的质量线性衰减如图2所示，图中黑色圆点表示经过一段散发时间后，该固-膜式甲醛标准散发样品实测的质量，黑色直线表示对实测的质量点的线性回归。该质量衰减由天平称量得到，其线性回归斜率即为固-膜式甲醛标准散发样品额定散发速率。A solid-membrane formaldehyde standard emission sample proposed by the present invention for detecting the accuracy of formaldehyde in the environmental chamber test has a constant emission rate, and the mass linear attenuation measured in the environmental chamber test environment of the present invention is shown in Figure 2. The black dots in the figure represent the measured mass of the solid-film formaldehyde standard emission sample after a period of emission time, and the black straight line represents the linear regression to the measured mass points. The mass attenuation is obtained by weighing with a balance, and its linear regression slope is the rated emission rate of the solid-film formaldehyde standard emission sample.
本发明的工作过程：Working process of the present invention:
将本固-膜式甲醛标准散发样品置于环境舱中，在一定的环境舱温湿度和换气次数下，一段时间环境舱内甲醛浓度会达到平衡。依据国标中乙酰丙酮分光光度法或酚试剂分光光度法测量空气中甲醛浓度的规定，对环境舱内气体进行采样分析，得出的环境舱内甲醛浓度与换气次数的乘积即为计算散发速率。将计算散发速率与额定散发速率比较，若误差≤15％，即认为该环境舱测试甲醛的结果是准确的。The solid-membrane formaldehyde standard emission sample is placed in the environmental chamber, and under a certain temperature and humidity of the environmental chamber and the number of air changes, the concentration of formaldehyde in the environmental chamber will reach equilibrium for a period of time. According to the provisions of the national standard for the measurement of formaldehyde concentration in the air by acetylacetone spectrophotometry or phenol reagent spectrophotometry, the gas in the environmental chamber is sampled and analyzed, and the product of the formaldehyde concentration in the environmental chamber and the number of air changes is the calculated emission rate. . Comparing the calculated emission rate with the rated emission rate, if the error is ≤15%, it is considered that the test result of the environmental chamber for formaldehyde is accurate.
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| CN103674640B (en) * | 2013-11-28 | 2017-04-05 | 安徽信灵检验医学科技有限公司 | Formaldehyde molecule membranization buffer solution and preparation method thereof |
| CN111238730A (en) * | 2020-03-16 | 2020-06-05 | 广州西唐机电科技有限公司 | Method for manufacturing standard container, method for testing performance of instrument, and standard container |
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