方法：分析样品中菌落总数不确定度的来源，采用合并样本标准差的方法来评定菌落总数的不确定度。
Methods: the source of measurement uncertainty of the colony determination in fishmeal was analyzed and the method of uniting standard deviation was applied to determine the uncertainty of the colony.
样品经大孔树脂柱、硅胶柱分离，然后用TLC进行鉴定合并。
The specimen was extracted by the macroreticular resin and silica gel column.
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