实木复合地板甲醛释放量四种测定方法的比较

采用气候箱法、40L干燥器法、9-11L干燥器法及穿孔革取法对市售实木复合地板的甲醛释放量进行了测定.通过对实验结果的对比分析,发现9-11L干燥器法适合于检测实木复合地板的甲醛释放量.     

几种竹凉席甲醛释放量检测方法探讨

采用水萃取法、40L干燥器法、（9～11）盱燥器法分别对竹凉席甲醛释放量进行检测,并对测试数据进行分析。研究发现,（9～11）L干燥器法测定甲醛释放量,取样面积相对较大,其试验结果波动较小,相比水萃取法、40L干燥器法,具有更好的稳定性和复珊性。建议LY/T1843-2009《竹席》、GB／T23114-2008《竹编制品》两个标准中甲醛释放量的检测方法统一,采用水萃取法、（9～11）L干燥器法两种方法分别进行测试,两者同时符合要求的产品才能正常使用。     

测试方法对人造板材甲醛散发浓度值的影响

采用穿孔法、干燥器法、气候箱法和密闭箱法四种方法测试胶合板、刨花板和细木工板三类人造板材的甲醛散发浓度。结果表明,当采用穿孔法、干燥器法和气候箱法三种测试方法时,三类板材之间的甲醛浓度测试值差异大,没有可比性,且对同类板材甲醛浓度测试值变化趋势也不同,不具有可比性。对比密闭箱法与气候箱法,对刨花板测试值可比性好,变化趋势一致。区别于气候箱法,密闭箱法测试装置简单、成本低、周期短。     

人造板游离甲醛释放量测试方法概述

简要介绍了现有的国内外人造板甲醛测试技术,如干燥器法、穿孔萃取法、气候箱法、气体分析法、抽吸测定法、WIKI法等,另外还介绍了比较少见的动态微型舱法和吸附槽法。     

利用微波进行甲醛的快速检测

<正> 我国人造板中甲醛的检测主要依据GB18580-2001《室内装饰装修材料人造板及其制品中甲醛释放限量》和GB18584-2001《室内装饰装修材料木家具中有害物质限量》。GB18580规定可采用穿孔萃取法、干燥器法和气候箱法测定人造板中的甲醛含量,气候箱法为仲裁方法。但这些方法都存在操作复杂及周期较长的缺点,如干燥器法需24小时,而气候箱法需7天,不利于监督人员现场分析检测,因而寻求甲醛的快速检测方法具有     

人造板甲醛释放量测试的气候箱法与干燥器法相关性研究

以20种规格型号不同的人造板样品为研究对象,分别采用1 m3气候箱法和干燥器法测试各样品的甲醛释放量,通过对比分析发现,本实验中的中密度纤维板、刨花板和胶合板样品的甲醛释放量气候箱法测试值在0.100～0.124 mg/m3时,其对应的干燥器法数值在0.5～0.7 mg/L范围内变化。当干燥器法浓度达到0.7 mg/L时,气候箱法浓度超过≤0.124 mg/m3的限量要求。     

进口南洋楹芯板甲醛释放量检测方法探讨

采用1 m^3气候箱法研究进口南洋楹芯板甲醛释放规律,并与干燥器法进行比对,结果表明：采用1 m^3气候箱法检测南洋楹芯板甲醛含量较9 L干燥器法数据稳定,26 h后箱内空气甲醛浓度趋于稳定,可进行取样检测。     

不同试验室对三项质检项目的比对检测结果

2003年10月23日至24日,全国人造板标准化技术委员会秘书处在北京举办了《人造板质量检验若干问题》研讨会,会议对人造板质检工作中存在问题较多的三项质检项目,表面耐磨、9～11L干燥器法和40L干燥器法测定甲醛释放量组织比对试验。试验样品均为浸渍纸层压木质地板,企业和质检机构不记名自愿参加。会上发出表面耐磨试件20份,9～11L和     

气候箱法测定实木复合地板甲醛释放量数学模型建立

采用GB 18580-2017标准中要求的1 m~3气候箱法,对实木复合地板甲醛释放量进行检测,同时采用干燥器法测定同一地板试样,显示两种方法检测结果呈线性相关。拟合建立数学模型y=0.1445x-0.0202(x:干燥器值,y:气候箱值),可以用干燥器法检测值预测气候箱法的检测值,为生产企业提供参考。     

人造板甲醛释放量测定--用气体分析法测定甲醛释放

人造板的甲醛释放已成为全社会关注的焦点之一。测定人造板甲醛释放有多种方法。其中“穿孔萃取法”“干燥器法”和“气候箱法”已被列入国家标准,向社会公布正式实施。“气体分析法”测定人造板甲醛释放量已有欧洲标准,因其能快速测定而在人造板的国际贸易中被采用。为了使行业内人士对此有所了解,本刊编辑部组织翻译了欧洲标准BS EN717—2:1995《人造板甲醛释放量测定—用气体分析法测定甲醛释放》,以飨读者。     

Empirical correlations between test methods of measuring formaldehyde emission of plywood, particleboard and medium density fiberboard

Since different test methods of measuring the formaldehyde emission (FE) from wood-based composite panels have been used for different countries and regions, this study attempted to establish empirical correlations between three test methods (i.e., 24-hour desiccator, 1 m³ chamber, and perforator) for plywood (PLW), particleboard (PB), and medium density fiberboard (MDF), particularly emphasizing on correlations between the 24-hour desiccator and the 1 m³ chamber method. The desiccator method found statistically high correlations with other two methods, resulting in regression coefficient values ranging from 0.96 to 0.88 for PLW, PB, and MDF samples. In particular, the desiccator method had an empirically high correlation with the 1 m³ chamber method that had been adopted as the reference method of comparing regionally different test methods of measuring the FE of wood-based composite panels by the ISO/TC89.     

Passive emission colorimetric sensor (PECS) for measuring emission rates of formaldehyde based on an enzymatic reaction and reflectance photometry

A coin-sized passive emission colorimetric sensor (PECS) based on an enzymatic reaction and a portable reflectance photometry device were developed to determine the emission rates of formaldehyde from building materials and other materials found indoors in only 30 minutes on-site. The color change of the PECS linearly correlated to the concentration of formaldehyde aqueous solutions up to 28 microg/mL. The correlation between the emission rates measured by using the PECS and those measured by using a desiccator method or by using a chamber method was fitted with a linear function and a power function, and the determination coefficients were more than 0.98. The reproducible results indicate that the emission rates could be obtained with the correlation equations from the data measured by using the PECS and the portable reflectance photometry device. Limits of detection (LODs) were 0.051 mg/L for the desiccator method and 3.1 microg/m2/h for the chamber method. Thus, it was confirmed that the emission rates of formaldehyde from the building materials classified as F four-star (< 0.3 mg/L (desiccator method) or < 5.0 microg/m2/h (chamber method)), based on Japanese Industrial Standards (JIS), could be measured with the PECS. The measurement with PECS was confirmed to be precise (RSD < 10%). Other chemicals emitted from indoor materials, such as methanol, ethanol, acetone, toluene, and xylene, interfered little with the measurement of formaldehyde emission rates by using the PECS.     

一元回归在人造板甲醛释放量测试中的应用

介绍了在人造板甲醛释放量测试中,运用统计方法中的一元回归来计算甲醛释放量曲线斜率,以及分析萃取法与干燥器法测量结果之间的关系。     

一元回归在人造板甲醛释放量测试中的应用

介绍了在人造板甲醛释放量测试中,运用统计方法中的一元回归来计算甲醛释放量曲线斜率,以及分析萃取法与干燥器法测量结果之间的关系。     

A Proximity Equilibration Cell for Rapid Determination of Sorption Isotherms

Sorption isotherm data are obtained by instrumental determination of water activity at a known moisture content or determination of moisture content after equilibration against a saturated salt solution. The latter method is simpler and the salt solutions are primary standards. However, the equilibration takes a long time, one to ten weeks, depending upon food composition. Thus, the objective of this work was to devise a method that retains the saturated salt solution but accelerates the rate of equilibration. In an equilibration environment between a food product and a saturated salt slurry, the driving force is the difference in vapor pressure; therefore the faster the vapor space reaches equilibrium with the saturated salt slurry, the quicker the maximum driving force for water absorption will be applied to the sample. It was felt that a reduction in the size of the usual large desiccater to a single sample size would provide the necessary area to volume ratio. The vessel chosen was a small plastic chamber (65 mm/53 mm). In this chamber, the surface area to vapor volume ratio was 0.3101 as compared to 0.0335 for the standard desiccator. The sample was contained in a standard aluminum weighing tray modified by removing a 44 mm diameter circular section from the bottom. This was replaced with a 47 mm diameter circle of Whatman No. 1 quantitative filter paper to support the sample and at the same time allow transmission of moisture. This would allow water molecules to travel in a straight line and thus the shortest distance between the saturated salt slurry and the sample. This small vessel with a single sample supported on a filter paper will be referred to as a Proximity Equilibration Cell (PEC). Using this technique, it was found that a 2/mm deep sample of corn starch required only 6 days for complete equilibration, as compared to 21 days for the conventional desiccator. Thus, the PEC satisfied the objective by reducing time by 70%. In making comparisons with the same salts in conventional and the PEC, it was noted that the end point was higher in the latter. Evidently, absorption in case of the conventional desiccator was so slow at the end that no weight gain could be detected in 24 hr but equilibrium had not yet been attained. In contrast, the PEC equilibrated so rapidly that it allowed a closer evaluation of true equilibrium.     

关于GB 18580—2001中（9～11）L干燥器法测定胶合板甲醛释放量方法之我见

以胶合板为检测对象,讨论了试件制取后放置时间不同、板材压制后的存放时间不同和同一张板材的部位不同,对甲醛释放量检测结果的影响。对GB 18580—2001中（9～11）L干燥器法测定胶合板甲醛释放量方法提出了一些建议。     

GB 18580-2001与EN 120:1992--穿孔法测定人造板甲醛释放量的比较与分析

对GB 18580-2001<室内装饰装修材料人造板及其制品中甲醛释放限量>中采用的穿孔萃取法和欧洲标准EN 1201992<Wood-based panel products Determination of formaldehyde content Extraction method(known as perforator method)>(以下简称EN 120)中的穿孔萃取法进行方法对比和试验结果比较,提出修改GB 18580-2001中采用的穿孔萃取法,建议等同采用EN 1201 992中的穿孔萃取法.