This paper gives a minute introduction of the present condition and existing problem of the sampling and preparation of coal as received and coal as fired at power plants in Anhui.

• 通过对现有的混纺比测试标准的比较分析,提出了改进的制样方法,并利用最小取样次数方法求得纤维计数根数,提高了检测的准确度。