flat-bed chromatogram

例句：

1. 1.The flat-bed chromatogram shows the presence of a certain compound in the sample.
   平板色谱图显示样本中存在某种化合物。
2. 2.The analysis was performed using a flat-bed chromatograph.
   分析使用了平板色谱仪。
3. 3. The flat-bed chromatogram revealed that there was a significant amount of impurities in the product.
   平板色谱图显示产品中有大量杂质。