木質材料之甲醛在乾燥器法之釋出量與小型容器法之逸散速率之相關性探討

Examining the Correlation of Wood-Based Materials Formaldehyde Emission between Desiccator Method and Small Emission Test Chamber Method

王松永(Song-Yung Wang)

《國立臺灣大學生物資源暨農學院實驗林研究報告》 25卷3期 (2011/09) Pp. 215-221

https://doi.org/10.6542/EFNTU.201109_25(3).0006

摘要

環保署要求室內空氣品質之甲醛在空氣中濃度須在0.08 ppm以下，此亦為世界衛生組織（WHO）之要求標準。由木質材料等建材所釋出甲醛量之檢測方法有玻璃乾燥器法與小型容器法。另有建築基準法所要求條件。本文主要敘述三者間之相互關係。在乾燥器法所測得甲醛釋出量（在水中濃度，mg/L）與由小型容器法所測得在第1天，與第21天之甲醛在空氣中之逸散速率（mg/m^2h）之間均有線性相關性，其R^2值為0.88-0.89。當將影響到甲醛在空氣中濃度之換氣量，材料表面積、溫度及濕度等進行考慮時，可以式③預測甲醛在空氣中濃度（C）。甲醛逸散速率（E），可以式④算出E值。若考慮到建材對甲醛吸收係數時，可依⑦式計算甲醛在空氣中濃度（C）。且可依⑧式計算甲醛之逸散速率（E）。

關鍵字

木質材料 ； 乾燥器法 ； 小型容器法 ； 甲醛釋出量 ； 甲醛逸散速率

並列摘要

The air quality of indoor formaldehyde concentration should be lower than 0.08ppm to meet the regulation of Environmental Protection Administration (EPA) Executive Yuan, R.O.C. This standard accords with the requirement for World Health Organization (WHO). Additionally, there are two determination approaches of formaldehyde emission from Wood-based materials, Desiccator Method and Small Emission Test Chamber Method. This paper described the correlativity among these standards.The linear relationships of formaldehyde emission determination was found between Desiccator method (concentration in distilled water, mg/L) and Small chamber method on day one and day 21st (emission rate in air, mg/m^2h). The linear regressions could be represented as formula① and ②; both R^2 values are 0.88 and 0.89 respectively. In the experimental condition, when the F1 standard of 0.3 (mg/L) substituted into formula ②, the value of 11 (μg/m^2h) of formaldehyde emission rate in Small chamber could be calculated. The value of 18 (μg/m^2h) could further be calculated when F2 standard of 0.5 (mg/L) were substituted.When the influential factors including air flow rate, product loading factor (Q/S), temperature and relative humidity (RH) on the concentration of formaldehyde in air (C) were considered, the C values could be calculated, from formula ③. When the value of 0.3 (mg/L) formaldehyde emission and the condition without controlled by Building Code (temperature 28 °C, 50%RH, Q/S:0.05) were substituted into formula ③, the C values of 0.077 ppm (0.093 mg/m^3) could be calculated. The formaldehyde emission rate (E) could be represented by formula ④, the values of E of 0.00465 (mg/m^2h) could be calculated. When the formaldehyde absorbed factor of building materials was considered, the values of C and E could be represented by formula ⑦and ⑧respectively.

並列關鍵字

Wood-based materials ； Desiccator method ； Small Emission Test Chamber method ； emission of formaldehyde ； emission rate of formaldehyde