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.
SPHERES OF APPLICATION
Healthcare metrological support, food industry, laboratory research.
| 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 |
