久久无码人妻一区二区三区午夜_久久久久精品久久久久影院蜜桃_亚洲综合欧美色五月俺也去_交换娇妻呻吟声不停中文字幕

For pH meter standardization. Sealed foil pouches of pH standardization buffers. pH is ± 0.02 at 25°C

• Ideal for on-site analyses
• Easy to Use
• Fresh and reliable

  Ideal for on-site analyses

  Sealed pouches are easy to transport - no chance of spillage.

  Easy to Use

  Just open the pouch and insert the electrode.

  Fresh and reliable

  Foil pouches prevent contamination and air exposure.

  Specifications

  Concentration:4.01 and 7.00 pH

  Description :Buffer Solution

  Platform :S

  Quantity:20/pk （10 each）