Zhouyqx As Shown 3 Pack Of Meter Buffer Powder For Precise And Easy Calibration 4.01Ph 6.86Ph And 9.18Ph
ZHOUYQX
❀ 3 packs of popular buffer , pH4.01, pH6.86 and pH9.18 ❀ Simple to use. Just add 250ml per powder packet ❀ Powder has an indefinite ❀ Easy procedure is written at the back of the packet ❀ Each powder packet/sachet makes 250ml of (when mixed with or deionized water)
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