Name of the primary CRM

CRM and batch No.

Certified characteristic

Certified value range

Expanded uncertainty of the certified value (P = 0.95), %

Area of application in titrimetry

CRM for composition of potassium hydrogen phthalate

GSO 2216-81

(batch 14, 2012)

Mass fraction of potassium hydrogen phthalate

99.90 - 100.00

0.018

Acidimetry

CRM for composition of sodium carbonate

GSO 4086-87

(batch 2, 2014)

Mass fraction of sodium carbonate

99.95 - 100.00

0.028

Alkalimetry

CRM for composition of potassium dichromate

GSO 2215-81

(batch 16, 2011)

Mass fraction of potassium dichromate

99.95 - 100.00

0.018

Oxidimetry

CRM for composition of sodium oxalate

GSO 3219-85

(batch 7, 2001)

Mass fraction of sodium oxalate

99.95 - 100.00

0.03

Reductometry

CRM for composition of trilon B (disodium salt of ethylene- diamintetraacetic acid)

GSO 2960-84

(batch 11, 2009)

Mass fraction of trilon B (disodium salt of ethylendiamin- tetraacetic acid)

99.70 - 100.00

0.03

Complexonometry

CRM for composition of sodium chloride

GSO 4391-88

(batch 3, 2012)

Mass fraction of sodium chloride

99.90 - 100.00

0.024

Sedimentometry

CRM for composition of ethylene- diamintetraacetic acid

GSO 9655-2010

(batch 1, 2010)

Mass fraction of ethylendiamin- tetraacetic acid

99.70 - 100.00

0.05

Complexonometry

CRM for composition of hydrochloric acid solution

GSO 9654-2010

(batch 2, 2013)

Molar concentration of hydrogen ions, mole/dm3

0.099 - 0.110

0.037

Acidimetry

CRM for composition of potassium chloride

GSO 9969-2011

(batch 1, 2012)

Mass fraction of potassium chloride

99.90 - 100.00

0.024

Sedimentometry