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Acidity measures МрН-1,2

Acidity measures МрН-1,2
Acidity measures МрН-1,2

Intended for

reproducing and transmitting the indicator of the activity of hydrogen ions (pH) in aqueous solutions in accordance with GOST R 8.120-2014 “State system for ensuring the uniformity of measurements. State measurement chain for pH measuring instruments. "

The working standard represents a hydrochloric acid solution (HCl) according to GOST 3118-77 and potassium chloride (KCl) of purity degree of high purity according to GOST 4234-77 in water of purity degree II according to GOST R 52501-2005, prepared in accordance with the document "Preparation of acidity measure МpН-1,2. Technological instruction. MGFK.25101.00006 ".

The solution reproduces the value of the activity of hydrogen ions of pH 1,2 at solution temperature of (36.5 ± 0.5) ° C.

The solution is contained in plastic bottles with a volume of 125 cm3 and 270 cm3. The bottles are leakproof and have a screw cap with a protective ring.

Reproducible value of рН at temperature of solution (36,5±0,5)°С 1,20
Limits of permissible absolute error of рН reproduction ±0,05
Volume of measure, cm3 125, 270
Bottle capacity, см3 125, 270
Lifetime, years not less than 1


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