国产在线无码视频一区_免费看片A级毛片免费看_国产午夜福利精品一区二区三区_99久久人妻精品免费一区

Convenient 3-Pack of color-coded buffer solutions. They are recommended for automatic calibration and assure accuracy （pH is ±0.02 pH units）.

• 33% Cost Reduction over single bottle purchase

  Concentration:4.01 pH to 10.01 pH

  Description :One container each of pH standardization buffer solutions at pH 4.01 （red）, 7.00 （yellow）, and 10.01 （blue）.

  Platform :S

  Volume:4 L bottles