Each bottle (500 mL) is supplied with a COFRAC Verification Certificate and Certificate of Conformity and Traceability drawn up accordin由上海植茂提供，作为HACH的合作伙伴，还提供COD试剂21258-15、COD试剂21259-15、OD试剂21258-25s

For pH meter standardization. Colorless solution. pH is ± 0.02 at 25°C.由上海植茂提供，作为HACH的合作伙伴，还提供COD试剂21258-15、COD试剂21259-15、OD试剂21258-25s

For pH meter standardization. Colorless solution. pH is ± 0.02 at 25°C.由上海植茂提供，作为HACH的合作伙伴，还提供COD试剂21258-15、COD试剂21259-15、OD试剂21258-25s

pH indicator for acidity and alkalinity titrations. Visual transition interval: pH 3.0 (yellow)-pH 4.6 (blue). Sample Size: 50 mL由上海植茂提供，作为HACH的合作伙伴，还提供COD试剂21258-15、COD试剂21259-15、OD试剂21258-25s

Standard Cell Solution for Hach pHD Differential pH and ORP Sensors, packaged in resealable 500 mL bottle. Used to replenish standard ce由上海植茂提供，作为HACH的合作伙伴，还提供COD试剂21258-15、COD试剂21259-15、OD试剂21258-25s

Standard Cell Solution for Hach pHD Differential pH and ORP Sensors, packaged in resealable 500 mL bottle. Used to replenish standard c.由上海植茂提供，作为HACH的合作伙伴，还提供COD试剂21258-15、COD试剂21259-15、OD试剂21258-25s

NIST-traceable calibration solution.由上海植茂提供，作为HACH的合作伙伴，还提供COD试剂21258-15、COD试剂21259-15、OD试剂21258-25s

Conductivity Reference Solution. Specify value when ordering, value is customized to your needs. Please contact us for more information!由上海植茂提供，作为HACH的合作伙伴，还提供COD试剂21258-15、COD试剂21259-15、OD试剂21258-25s