The physicochemical quality reproduced by the standard is the value of molecular activity of hydrogen ions expressed by its pH exponent. 
The certified pH value is traceable to the N.I.S.T. and the national pH measurement standard.

The pH value of standards depends on temperature and the values are shown in the certificate of the standard example.
pH standards examples are distributed in 100 cm3 bottles and 250 cm3 bottles.

pH standards evaluate the pH scale and they are designed for the standardisation of pH-meters and to check the accuracy of pH-electrodes.

pehametryczne


pH STANDARDS LIST

LP

Type No. 

Standard name

pH Value 
(25 °C)

Expanded Uncertainty (k=2)   

1.

BLS 099.010

TETRO-XALATE

1,68

0,01

2.

BLS 099.030

CITRATE

3,78

0,01

3.

BLS 099.040

PHTHALATE

4,01

0,01

4.

BLS 099.060

PHOSPHATE
(1:1)

6,86

0,01

5.

BLS 099.070

PHOSPHATE
(1:1.37)

7,00

0,01

6.

BLS 099.071

PHOSPHATE
(1:3.5)

7,41

0,01

7.

BLS 099.090

BORATE

9,18

0,02

8.

BLS 099.100

CARBONATE

10,01

0,02

9.

BLS 099.120

CALCIUMATE

12,4

0,1

The CRM pH certificate is issued as a reference material certificate confirming its metrological properties including PCA accreditation symbols, that confirm compliance with the requirements of ISO 17034 for manufacturers of reference materials.

For pH reference materials, a reference material certificate for compliance with ISO 17025 can be issued, which shows metrological properties with PCA accreditation symbols based on the signatory status of multilateral EA-MLA and ILAC-MRA agreements on mutual recognition of calibration certificates.

CALIBRATION LABORATORY ACCREDITED by Polish Centre for Accreditation, a signatory to EA MLA and ILAC MRA that include recognition of calibration certificates. The laboratory meets the requirements of standard PN-EN ISO/IEC 17025.

 

Our certificates

PRODUCER CERTIFIELD REFERENCE MATERIALS (CRMs) ACCREDITED by Polish Centre for Accreditation. The laboratory meets the requirements of standard ISO 17034.

 

RM002

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