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通过研究不同的消解体系对塑格悬浮式运动地板的消解效果,确立了以HNO3-H2O2-HF为微波消解体系消解样品的方法,并用电感耦合等离子体质谱仪(ICP-MS)和电感耦合等离子体发射光谱仪(ICP-OES)测定塑格悬浮式运动地板中4种重金属Pb、Cd、Cr和Hg的含量。ICP-MS和ICP-OES法的线性相关系数均大于0.999。ICP-MS法的加标回收率在82.0%～111.5%之间,RSD在0.1%～11.1%之间,ICP-OES法的加标回收率在97.1%～116.5%之间,RSD在0.2%～9.2%之间。这两种方法具有快速、简便、准确、灵敏度高等优点,均适合塑格悬浮运动地板中这4种重金属的检测。两种方法中,ICP-MS检出限较低,在样品痕量及超痕量分析有重要应用,但其仪器成本高,普及率低,而ICP-OES在基层实验室的普及率更高。
By studying the digestion effect of different digestion systems on the plastic floating suspended floor, a method of digesting samples with HNO3-H2O2-HF as microwave digestion system was established. The samples were separated by inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma Determination of four heavy metals Pb, Cd, Cr and Hg in plastic floating suspended floor by ICP-OES. The linear correlation coefficients of ICP-MS and ICP-OES were all greater than 0.999. The spiked recoveries of ICP-OES were between 82.0% and 111.5% and the RSDs were between 0.1% and 11.1%. The spiked recoveries of ICP-OES were between 97.1% and 116.5% and the RSDs were between 0.2% ~ 9.2% between. These two methods have the advantages of fastness, simplicity, accuracy, high sensitivity and the like, and are suitable for the detection of four kinds of heavy metals in the plastic floating sports floor. The lower limit of detection (ICP-MS) of the two methods is important for trace and ultra-trace analysis of samples but the high cost and low penetration of ICP-OES in labs at higher levels .