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Standard titers and standard samples

We offer standard titers and standard samples for purchase. All products comply with regulatory and technical documentation and are supplied with a full package of accompanying documents.

Standard titles and Certified reference materials of approved type

Standard-titers are precise weighings of reagents or exact volumes of concentrated reagent solutions, packaged in ampoules.

Field of application:

Standard-titers are used in laboratory practice for quantitative chemical analysis. They are intended for the preparation of aqueous solutions with a specified volume and molar concentration of equivalent (MCE) of the substance:

C(x ) = (0.100 ± 0.001) mol/dm3

For standard-titers of sodium hydroxide and potassium hydroxide, the MCE of the prepared solutions:

C (NaOH, KOH) = (0.100 ± 0.002) mol/dm3

For the standard-titer of potassium ferricyanide, the MCE of the prepared solution:

C(K3[Fe(CN)6]) = 0.0500 ± 0.0005 mol/dm3


Characteristics of standard-titers:
No. Name Volume, dm3 MCE range, mol/dm3 Packaging type Warranty period, years

1

Ammonium thiocyanate (Ammonium rhodanide)

1.0

0.100 ± 0.001

A

10

2

Ammonium chloride

1.0

0.100 ± 0.001

A

3

3

Ammonium oxalate

1.0

0.100 ± 0.001

A

4

4

Barium chloride

1.0

0.100 ± 0.001

A

4

5

Iodine

0.5

0.100 ± 0.001

A

2

6

Potassium bromide

1.0

0.100 ± 0.001

A

2

7

Potassium bromate

1.0

0.100 ± 0.001

A

2

8

Potassium bromide-bromate

1.0

0.100 ± 0.001

A

2

9

Potassium hydroxide

1.0

0.100 ± 0.002

A, C

1

10

Potassium dichromate

1.0

0.100 ± 0.001

A

3

11

Potassium iodide

1.0

0.100 ± 0.001

A

3

12

Potassium iodate

1.0

0.100 ± 0.001

A

3

13

Potassium permanganate

1.0

0.100 ± 0.001

A

10

14

Potassium thiocyanate (Potassium rhodanide)

1.0

0.100 ± 0.001

A

2

15

Potassium carbonate

1.0

0.100 ± 0.001

A

3

16

Potassium chloride

1.0

0.100 ± 0.001

A

3

17

Potassium chromate

1.0

0.100 ± 0.001

A

2

18

Potassium oxalate

1.0

0.100 ± 0.001

A

4

19

Potassium ferricyanide (Potassium hexacyanoferrate (III))

0.5

0.0500 ± 0.0005

A

2

20

Potassium ferrocyanide (Potassium hexacyanoferrate (II))

0.5

0.100 ± 0.001

A

3

21

Nitric acid

1.0

0.100 ± 0.001

A

3

22

Sulfuric acid

1.0

0.100 ± 0.001

A

7

23

Hydrochloric acid

1.0

0.100 ± 0.001

A

10

24

Acetic acid

1.0

0.100 ± 0.001

A

10

25

Oxalic acid

1.0

0.100 ± 0.001

A

4

26

Succinic acid

1.0

0.100 ± 0.001

A

1

27

Magnesium sulfate

1.0

0.100 ± 0.001

A

2

28

Sodium bromate

1.0

0.100 ± 0.001

A

1

29

Sodium hydroxide

1.0

0.100 ± 0.002

A, C

1

30

Sodium thiosulfate

1.0

0.100 ± 0.001

A

6

31

Sodium carbonate

1.0

0.100 ± 0.001

A

5

32

Sodium bicarbonate

1.0

0.100 ± 0.001

A

2

33

Sodium tetraborate

1.0

0.100 ± 0.001

A

5

34

Sodium chloride

1.0

0.100 ± 0.001

A

3

35

Sodium oxalate

1.0

0.100 ± 0.001

A

4

36

Silver nitrate

1.0

0.100 ± 0.001

1 ampoule

2

37

Disodium salt of ethylenediamine N,N, N',N' tetraacetic acid

(Trilon B)

1.0

0.100 ± 0.001

A

7

38

Ammonium iron(II) sulfate hexahydrate (Mohr's salt)

0.5

0.100 ± 0.001

A

3

Packaging:

Type A – 10 glass ampoules in a cardboard box;

Type C – 10 polymer ampoules (vials) in a cardboard box


Standard-titers for the preparation of buffer solutions – working standards of pH 3rd category ST-pH-03.3 (TU-2642-595-00205087-2006)

Standard-titers are precise weighings of chemical substances, packaged in sealed glass ampoules or plastic vials with screw caps.

Registration number in the Federal Information Fund for Ensuring the Uniformity of Measurements No. 31181-06.

LLC "UZKhP" is accredited in the field of ensuring the uniformity of measurements for performing work and (or) providing services for the verification of measuring instruments.
Accreditation certificate No. RA.RU.311987 issued on March 3, 2017.


Scope of application:

When dissolving these precise samples in 1 dm3 of distilled water, buffer solutions are obtained — working pH standards of the 3rd category with corresponding pH values according to GOST 8.134-2014, GOST 8.135-2004.
The working pH standards prepared from standard-titres are used for verification, graduation, and calibration of pH measuring instruments in accordance with GOST 8.120-2014, for monitoring the metrological characteristics of measuring instruments and errors of pH measurement methods for liquid media.


Characteristics of standard-titres ST-pH-03.3
No. Chemical composition of standard-titres Substance mass (g) pH value of working pH standards
of the 3rd category, prepared from
standard-titres, at 25 0C

1

Potassium tetraoxalate
KH3(C2O4)2×2H2O

12.610

1.65

2

Potassium hydrogen tartrate KHC4H4O6

9.500

3.56

3

Potassium hydrogen phthalate
KHC8H4O4

10.120

4.01

4

Potassium dihydrogen phosphate
KH2PO4

Sodium hydrogen phosphate
Na2HPO4

3.390

3.530

6.86

5

Sodium tetraborate decahydrate
Na2B4O7×10H2O

3.810

9.18

6

Calcium hydroxide
Ca(OH)2

1.800

12.43

The characteristics of standard-titres comply with GOST 8.135-2004. Buffer solutions prepared from standard-titres ST-pH-03.3 reproduce the nominal pH values specified in the table.

The limits of permissible absolute error ΔpH of buffer solutions — working pH standards of the 3rd category, prepared from standard-titres ST-pH-03.3, are ±0.03 pH.
The shelf life of standard-titres is 1.5 years.

Standard-titres for preparing buffer solutions — working pH standards of the 3rd category undergo initial verification upon release from production. Standard-titres are not subject to periodic verification.


Package contents, packaging

Depending on the chemical composition, six modifications of standard-titres ST-pH-03.3 are manufactured. Package contents:
— 6 ampoules of one modification in a cardboard box;
— a set that includes 1 ampoule of each modification, total 6 pcs. in a cardboard box.

Upon customer request, other options for assembling sets from standard-titres of the specified modifications are possible.

Certified reference materials (CRM) of approved type

As a manufacturer of certified reference materials, LLC "UZKhP" is accredited in accordance with the requirements of International Standard ISO 17034:2016.

Accreditation body - AAC "Analitika", accreditation certificate No. AAS.RM.00502 dated July 13, 2020.

LLC "UZKhP" produces certified reference materials (CRM) of approved type: composition of ion solution, composition of phenol solution in ethanol, total water hardness, simulator of mass concentration of residual active chlorine in water and aqueous media

Certified reference materials are solutions of initial reagents in bidistilled water with specific electrical conductivity not exceeding 2.0·10-6 S/cm at a temperature of 25 ˚C or in a corresponding background solution, placed in sealed, chemically resistant to the material of the standard sample, marked glass or polymer ampoules


Scope of application:

  • certification of measurement methods;

  • accuracy control of measurement methods;

  • verification, calibration, graduation of measuring instruments (MI),

  • monitoring of metrological characteristics of MI during their testing, including for the purpose of type approval.


Certified characteristic of CRM:

- mass concentration of ion (substance), mg/cm3;

- total molar concentration of equivalent of calcium and magnesium ions (for CRM of total water hardness).

The limits of permissible value of relative error of the certified value of CRM are ± 1.0 % at a confidence level of P = 0.95.

The permissible values of relative expanded uncertainty of the certified value of the standard sample at a coverage factor of k=2 are 1.0 %.

The shelf life of a CRM specimen is 3 years.


Characteristics of certified reference materials:
No. Name of CRM Number in the State Register of CRM Range of permissible certified values, mg/cm3 Background solution Type of packaging

1

CRM of composition of lead ion solution

GSO
7252-96

0.95 – 1.05

Nitric acid
1.0 mol/dm3

A

2

CRM of composition of sulfate ion solution

GSO
7253-96

0.95 – 1.05

Bidistilled water

A

3

RM of iron (III) ion solution composition

GSO
7254-96

0.95 – 1.05

Nitric acid
1.0 mol/dm3

A

4

RM of copper (II) ion solution composition

GSO
7255-96

0.95 – 1.05

Nitric acid
1.0 mol/dm3

A

5

RM of zinc ion solution composition

GSO
7256-96

0.95 – 1.05

Nitric acid
1.0 mol/dm3

A

6

RM of chromium (VI) ion solution composition

GSO
7257-96

0.95 – 1.05

Bidistilled water

A

7

RM of nitrate ion solution composition

GSO
7258-96

0.95 – 1.05

Bidistilled water

A

8

RM of ammonium ion solution composition

GSO
7259-96

0.95 – 1.05

Bidistilled water

A

9

RM of phosphate ion solution composition

GSO
7260-96

0.475 – 0.525

Bidistilled water

A

10

RM of fluoride ion solution composition

GSO
7261-96

0.95 – 1.05

Bidistilled water

C

11

RM of chloride ion solution composition

GSO
7262-96

0.95 – 1.05

Bidistilled water

A

12

RM of mercury (I) ion solution composition

GSO
7263-96

0.95 – 1.05

Nitric acid
1.0 mol/dm3

A

13

RM of arsenic (III) ion solution composition

GSO
7264-96

0.095 – 0.105

Hydrochloric acid 0.02 mol/dm3

A

14

RM of nickel ion solution composition

GSO
7265-96

0.95 – 1.05

Nitric acid
1.0 mol/dm3

A

15

RM of manganese (II) ion solution composition

GSO
7266-96

0.95 – 1.05

Nitric acid
1.0 mol/dm3

A

16

RM of vanadium (V) ion solution composition

GSO
7267-96

0.95 – 1.05

Nitric acid
1.0 mol/dm3

A

17

RM of cobalt ion solution composition

GSO
7268-96

0.95 – 1.05

Nitric acid
1.0 mol/dm3

A

18

RM of aluminum ion solution composition

GSO
7269-96

0.95 – 1.05

Nitric acid
1.0 mol/dm3

A

19

RM of phenol in ethanol solution composition

GSO
7270-96

0.95 – 1.05

Rectified ethyl alcohol

A

20

RM of zinc ion solution composition

GSO
7470-98

9.5 – 10.5

Nitric acid
1.0 mol/dm3

A

21

RM of zinc ion solution composition

GSO
7471-98

0.095 – 0.105

Hydrochloric acid

0.1 mol/dm3

A

22

RM of cadmium ion solution composition

GSO
7472-98

0.95 – 1.05

Nitric acid
1.0 mol/dm3

A

23

RM of potassium ion solution composition

GSO
7473-98

0.95 – 1.05

Bidistilled water

C

24

RM of sodium ion solution composition

GSO
7474-98

0.95 – 1.05

Bidistilled water

A

25

RM of calcium ion solution composition

GSO
7475-98

0.95 – 1.05

Nitric acid
0.1 mol/dm3

C

26

RM of iron (III) ion solution composition

GSO
7476-98

9.5 – 10.5

Nitric acid
1.0 mol/dm3

A

27

RM of bismuth (III) ion solution composition

GSO
7477-98

0.95 – 1.05

Nitric acid
1.0 mol/dm3

A

28

RM of chloride ion solution composition

GSO
7478-98

9.5 – 10.5

Bidistilled water

A

29

RM of nitrite ion solution composition

GSO
7479-98

0.95 – 1.05

Bidistilled water

A

30

RM of sulfate ion solution composition

GSO
7480-98

9.5 – 10.5

Bidistilled water

A

31

RM of copper (II) ion solution composition

GSO
8205-2002

9.5 – 10.5

Nitric acid
1.0 mol/dm3

A

32

RM of silver ion solution composition

GSO
8204-2002

0.95 – 1.05

Nitric acid
1.0 mol/dm3

A

33

RM of total water hardness

GSO
8206-2002

total molar
concentration of
equivalent of calcium
and magnesium ions
(95.0– 105.0)
mmol/dm3

Bidistilled water

A

34

RM of simulator of mass concentration of residual active chlorine in water and aqueous media

GSO
8203-2002

(950 – 1050)

mg/dm3

Bidistilled water

A


RM completeness:
- Type A: five ampoules made of chemically resistant glass in a packaging box, supplied with a label and passport, executed in accordance with GOST R 8.691-2010

- Type C: ampoule or vial made of polymer material, chemically resistant to the material of the standard sample, in packaging, supplied with a label and passport, executed in accordance with GOST R 8.691-2010



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