本研究以建立生物可分解塑膠之重金屬檢測方法為目的。首先,使用歐洲標準參考物質ERM 681K 進行傳統加熱板消化法和微波消化法的實驗,並以感應耦合電漿發射光譜分析儀(ICP-OES)分析砷、鎘、汞及鉛四個重金屬元素,評估各個元素之回收率,找尋分析重金 屬元素的最適條件與準確性;而以建立之微波消化程序分析生物可分解性塑膠。希望藉此研究成果能提供一個快速、準確、靈敏之生物可分解塑膠材料中重金屬分析方法。研究結果顯示,取0.2 g 樣品加入0.8 mole 王水採用密閉微波消化法可做為最適化條件,經由 ICP-OES,分析標準參考物質之重金屬含量,並獲得良好的精確度。由標準參考物質中砷、鉛、鎘及汞的回收率分別在99.9±6.5 %、94±2.3 %、94.7±1.7 %、94.39±4.0 %之範圍內。而建立對於生物可分解樣品的重金屬含量有良好回收率。本研究建立之模式,可提供進行微波消化基質之塑膠樣品之重金屬含量的參考方法。
The purpose of this research is to develop a method for determing the heavy metals (As、Cd、Hg、Pb、) in the biodegradable plastic materials.First, using the European standard reference materials ERM 681Kin the traditional heating plate digestion and microwave digestion experiments. Arsenic, cadmium, mercury and lead was quantified in the inductively coupled plasma emission spectrometer(ICP-OES) analysis to assess the recovery rate. Through this process, we found the optimal conditions for the four heavy metals by the microwave digestion method. Finally, the establishment of the microwave digestion procedure for the biodegradable plastic materials, can provide a fast, accurate and sensitive method for heavy metal analysis biodegradable plastic materials. The best results obtained by adding 0.8mole for aqua regia 0.2 g samples in the Microwave digestion using trace of arsenic, cadmium, mercury and lead, can be quantified by ICP-OES and got good accuracy. In this study, The recovery of arsenic, cadmium, mercury and lead reference material EC-681K plastic was 99.9±6.5 %、94±2.3 %、94.7±1.7 %、94.39±4.0 %, respectively to make sure the good recovery of target metals in the biodegradable plastic samples. Therefore the determination of real. The established method can provide a good model in determining the toxic metals in the biodegradable plastic by the Microwave digestion pretreatment.