ACCREDITATION SCOPE
of reference material producer
the «Center of Reference Materials and
High-Purity Substances», Ltd
(Appendix to the Accreditation
Certificate No ААС.RM.00157, dated August 30, 2019)
Section 1. Certified Reference Materials
(CRM)
N item |
Type of reference
material |
Kind
of reference material |
Property |
Range |
Expanded uncertainty |
Approach used to
assign property value |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
INORGANIC REFERENCE MATERIALS (А2) |
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1 |
Aqueous
solutions of single-component cations (А2.6.1) |
Glass
ampoules Plastic
screw cap tubes |
Ion
mass concentration |
(0,0475 – 10,5) g/dm3 |
(0,25 – 1) % (relative) |
Measurement by primaries methods in a single
laboratory: constant-potential coulometry, coulometric titration, gravimetry. Measurement by secondary methods according to
certified measurement procedures and using CRM, certified by primaries
methods: titrimetry, AC conductometry |
2 |
Aqueous
solutions of single-component anions (А2.6.2) |
Glass
ampoules Plastic
screw cap tubes |
Ion
mass [molar] concentration |
(0,095
– 10,5) g/dm3 [
(0,97 – 1,03) mol/dm3] |
(0,25 – 2) % (relative) [0,5 % (relative)] |
Measurement by primaries methods in a single
laboratory: coulometric titration, gravimetry. Measurement by secondary methods according to
certified measurement procedures and using CRM, certified by primaries
methods: titrimetry, AC conductometry,
spectrophotometry |
3 |
Multi-component
aqueous solutions of metals (А2.6.3) |
Glass
ampoules Plastic
screw cap tubes |
Mass
concentration of metal ion |
(0,095 – 0,525) g/dm3 |
2 % (relative) |
Measurement by secondary methods according to
certified measurement procedures and using CRM, certified by primary method:
ICP spectrometry |
ORGANIC REFERENCE MATERIALS (А3) |
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4 |
Pure
chemical substances (А3.1.1) |
Glass
ampoules |
Molar
fraction of basic substance |
(99,30 – 99,98) % |
(0,04 – 0,14) % (absolute) |
Measurement by primaries methods in a single
laboratory: cryometry |
5 |
Solutions
of organic substances in organic solvents (А3.1.2) |
Glass
ampoules |
Mass
concentration of organic compound |
(0,095 – 52,5) g/dm3 |
(2,0 – 4,0) % (relative) |
Measurement by
secondary methods according to certified measurement procedures and using
CRM, certified by primary method: gas chromatography |
REFERENCE MATERIALS for environmental analysis (А4) |
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6 |
Properties
of aqueous media (А4.3.1) |
Glass
ampoules Plastic
screw cap tubes |
Turbidity |
(3800 – 4200) FTU (formazine turbidity units) |
2,0 % (relative) |
Measurement by
secondary methods using high precision measuring instruments and working
standards: spectrophotometry |
Colour |
(475 – 525) degrees of colour |
1,5 % (relative) |
||||
Total
hardness |
(9,5 – 105) degrees of hardness |
1,5 % (relative) |
Measurement by
secondary methods according to certified measurement procedures and using CRM,
certified by primary method: titrimetry |
|||
COD
(dichromate oxidation of water) |
(9500 – 10500) mg/dm3 |
1,5 % (relative) |
||||
Total
alkalinity |
(950 – 1050) mmol/dm3 |
1 % (relative) |
||||
TDS
|
(47500 – 52500) mg/dm3 |
1 % (relative) |
Measurement by
primaries methods in a single laboratory: gravimetry |
|||
ION ACTIVITY (А9) |
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7 |
рН
standards (А9.1) |
Plastic
containers |
рН |
(1,65 - 9,18) pH |
0,01
рН |
Measurement by
secondary method using high precision measuring instruments and working
standards: potentiometry |
8 |
Electrical
conductivity standards (А9.3) |
Glass
ampoules |
Specific
electrical conductivity |
(0,0045 – 11,8) Sm/m |
0,25
% (relative) |
Measurement by
secondary method using high precision measuring instruments and working
standards: AC conductometry |
Section 2. Reference Materials (RM)
N item |
Type of reference
material |
Kind
of reference material |
Property |
Range |
Approach used to characterize |
1 |
2 |
3 |
4 |
5 |
6 |
ORGANIC REFERENCE MATERIALS (А3) |
|||||
9 |
Standards for
chromatography (А3.1.3) |
Glass
ampoules |
Molar
fraction of basic substance |
(99,30 – 99,99) % |
Measurement
by secondary method: gas chromatography |
REFERENCE MATERIALS for environmental analysis (А4) |
|||||
10 |
Organic
pollutants (А4.3.2) |
Glass vials |
Mass of oils |
(6,5 – 0,015) mg |
Measurement
by primaries methods in a single laboratory: gravimetry |