小麦粉中铅的测定方法探讨

Discussion on the Method for Determination of Plumbum in Wheat Flour

目的：寻找一组最优化的消解和仪器方法测定小麦粉中的铅。方法：以干法消化、湿法消化、微波消化三种消化方法和石墨炉原子吸收法（GFAAS）、原子荧光法（AFS）两种仪器法进行6组正交实验。结果：采用微波法消化，以GFAAS测定的方法回收率最高，重现性最好，检出限最低，操作简便，方法可靠。结论：可用微波消解-GFAAS法作为测定小麦中的铅的首选方法。

Objective： To find out an optimum method of assimilation and instrument to determine Plumbum in wheat flour. Method： To perform six cross-experiments of the three assimilation methods, dry assimilation, wet assimilation and microwave assimilation and of two instrument methods, GFAAS and AFS. Results： The method of microwave assimilation-GFAAS can get the highest recovery, the best recurrence and the lowest detection limit, the operation is simple and the method is dependable. Conclusion： The method of microwave assimilation-GFAAS is the preferred one to determine Plumbum in wheat flour in this experiment.