利用GC - 900气相色谱分析仪检测甲苯的浓度，通过正交实验得出了实验过程的最佳操作参数。

GC-900 gas chromatography apparatus is used to detecting the concentration of methylbenzene gas, and the best parameters of this experiment equipment are got by doing orthogonal experiment.

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通过检测不同探针浓度对探针固定效率及杂交效率的的影响，确定最佳点样浓度。

The optimal spotting concentration was determined through comparing the effect of different capture probe concentration on its covalent fixation and on the hybridization efficiency.

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