Acidity measures МрН-1,2
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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