”Physical-Chemical Measurements” Laboratory


The ”Physical-Chemical Measurements” Laboratory manages – undertakes, preserves and disseminates through modern equipment the measurement units of: pH, density, refraction index, spectral transmission factor, luminous intensity.

The mentioned measurement units are crucial for heavy industry, food, chemical, light and textile industry, medicine etc. 

Main objectives of the laboratory are:

  • Assurance of uniformity, accuracy and traceability of measurements on the territory of the Republic of Moldova.
  • Management, maintenance, storage, preservance of measurement standards and of the equipment owned by the laboratory.
  • Research of the National Measurement Standards Base and of the equipment owned by the laboratory.
  • Storage, reproduction and dissemination of measurement units from national and reference measurement standards to the other standards and measuring instruments according to ierarchic schemes.
  • Participation in interlaboratory comparisons at international level for demonstration of laboratory measurement capabilities. 
  • High accuracy measurements performance.
  • Maintenance and continuous improvement of the quality management in the laboratory.
  • Development of calibration procedures for satisfying the necessity of economic agents regarding the traceability of measurement units.

Anatolii Bescupschi - Head of laboratory

Tel: (373 22) 903 141

E-mail: fizico.chimice@inm.gov.md

National and reference measurement standards

The Laboratory has the following national measurement standards:

The national measurement standard of spectral transmittance factor and optical density unit:

The reference measurement standard of pH unit:

The national measurement standard of density of liquids unit:

Measurement capabilities and services

The Physical-Chemical Measurements Laboratory offers a wide range of services to the consumer. The laboratory's activity is oriented towards the calibration of measuring instruments, ensuring the measurement uncertainty according to the measurement capabilities provided below:

Table 1. Calibration areas accredited by MOLDAC

Equipment

Measurement range

Uncertainty

Unit

Spectrophotometers

0 ÷ 2

200 ÷ 3000

0,005

0,2

A

nm

Neutral filters

0 ÷ 8

0,005

A

Spectral filters

200 ÷ 2000

0,2

nm

Photoelectrocolorimeters

315 ÷ 980

0 ÷ 100

0,2 ÷ 1

0,4 ÷ 2

nm

%T

Electronic densimeters

650 ÷ 1400

0,2

kg/m3

Glass densimeters

650 ÷ 1400

0,3

kg/m3

Glass alcoholmeters

0,2 ÷ 96,0

0,06

% vol. alc

pH-meters

1 ÷ 12

0,03

pH

Luxmeters

10 ÷ 600

5 %

lx

Conductometers

13 ÷ 1420

(3,0 ÷1,5) %

µS/cm

 


Table 2. Calibration areas based on self-declaration

Equipment

Measurement range

Uncertainty

Unit

Refractometers

1,333 ÷ 1,741

2 · 10-4

ηD

Polarimeters

-150 ÷ 150

0,003 ÷ 0,500

°

Concentration analyzers

1 · 10-6 ÷ 1

(1 ÷ 4) %

g/dm³

Conductometers

0 ÷ 1420

(3,0 ÷1,5) %

µS/cm

Gas-chromatographs

1 ∙ 10-4 ÷ 15

(1 ÷ 10) % of the value

%

The calibrations performed by the Laboratory are conducted according to the requirements of SM SR EN ISO/CEI 17025. The Laboratory provides trainings focused on accurate measurements and determination of their conventional values by applying correction factors and using the measurement uncertainty, as well as experience exchange. The trainings are provided on all sub-fields of the Physical-Chemical Measurements Laboratory. 

Traceability routes
Traceability route of spectral transmittance factor and optical density unitPublished: 03.05.2019
Traceability route of density of liquids unitPublished: 07.05.2019
Traceability route of pH unitPublished: 07.05.2019