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General physics
Ionizing radiation
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In the CMCs uncertainty statements, the notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a 2 + b 2]1/2
Unless otherwise stated the expanded uncertainties given below correspond to k = 2 (at a 95 % level of confidence)
Egypt, NIS (National Institute for Standards)
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
mass fraction mg/kg in mg/kg Relative expanded uncertainty in % mass fraction mg/kg in mg/g Relative expanded uncertainty in %
Ground water bromide 1 to 1000 1.0E1 to 2 1 to 1000 1.1E1 to 2
sea water bromide 1 to 2.50E4 3.0E1 to 2 1 to 2.50E4 3.1E1 to 2
High and hypersaline waters bromide 1 to 1.00E4 3.0E1 to 2 1 to 1.00E4 3.1E1 to 2
fresh water bromide 1 to 1000 1.0E1 to 2 1 to 1000 1.1E1 to 2
sea water chloride 1 to 2.50E4 4 to 2 1 to 2.50E4 4.5 to 2
High and hypersaline waters chloride 1 to 1.00E4 5 to 2 1 to 1.00E4 5.5 to 2
Ground water chloride 1 to 1000 4 to 2 1 to 1000 4.5 to 2
fresh water chloride 1 to 1000 4 to 2 1 to 1000 4.5 to 2
drinking water nitrate 1 to 1000 1.0E1 to 2 1 to 1000 1.1E1 to 2
fresh water nitrate 1 to 1000 1.0E1 to 2 1 to 1000 1.1E1 to 2
High and hypersaline waters nitrate 1 to 1.00E4 2.5E1 to 2 1 to 1.00E4 2.6E1 to 2
sea water nitrate 1 to 2.50E4 2.5E1 to 2 1 to 2.50E4 2.6E1 to 2
High and hypersaline waters sulfate 1 to 1.00E4 3 to 2 1 to 1.00E4 3.5 to 2
fresh water sulfate 1 to 1000 3 to 2 1 to 1000 3.5 to 2
sea water sulfate 1 to 2.50E4 4 to 2 1 to 2.50E4 4.5 to 2
drinking water sulfate 1 to 1000 3 to 1 1 to 1000 3.5 to 1
  • Mechanism for measurement service delivery : Reference measurements, preparation and value assignment of bromide calibration solutions
  • Approved on 04 August 2025
  • Institute service identifier : ORG-48R014
  • CMC ID : AFRIMETS-QM-EG-00000QFI-1,AFRIMETS-QM-EG-00000QF8-1,AFRIMETS-QM-EG-00000QFG-1,AFRIMETS-QM-EG-00000QFH-1,AFRIMETS-QM-EG-00000QF6-1,AFRIMETS-QM-EG-00000QF7-1,AFRIMETS-QM-EG-00000QFF-1,AFRIMETS-QM-EG-00000QFE-1,AFRIMETS-QM-EG-00000QFY-1,AFRIMETS-QM-EG-00000QFX-1,AFRIMETS-QM-EG-00000QFJ-1,AFRIMETS-QM-EG-00000QF9-1,AFRIMETS-QM-EG-00000QFZ-1,AFRIMETS-QM-EG-00000QG0-1,AFRIMETS-QM-EG-00000QFA-1,AFRIMETS-QM-EG-00000QG1-1
     
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in mg/g Relative expanded uncertainty in % Mass fraction in mg/g Relative expanded uncertainty in %
water ethanol 0.1 to 10 2.2 to 0.7 0.2 to 5 2.2 to 0.7
  • Mechanism for measurement service delivery : NIS-CRM-ORG-01, NIS-CRM-ORG-02
  • Approved on 08 July 2020
  • Institute service identifier : RML-ORG-01
  • CMC ID : AFRIMETS-QM-EG-00000LH9-1
     
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in mg/kg Relative expanded uncertainty in % Mass fraction in mg/kg Relative expanded uncertainty in %
cosmetic cream lead 0.2 to 100 2 to 1.3E1 5 to 100 1 to 5
  • Mechanism for measurement service delivery : CRM production and reference measurements
  • Approved on 19 June 2015
  • Institute service identifier : RML-IOR 02
  • CMC ID : AFRIMETS-QM-EG-000000MT-1
     
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in mg/g Absolute expanded uncertainty in mg/kg Mass fraction in mg/g Absolute expanded uncertainty in mg/g
rice flour lead 0.1 to 1 3.0E-2 to 5.0E-2 9.95 to 10.01 3.0E-2
  • Mechanism for measurement service delivery : Elemental analysis, CRM production
  • Approved on 04 August 2025
  • CMC ID : AFRIMETS-QM-EG-00000QI5-1
     
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in mg/kg Absolute expanded uncertainty in mg/kg Mass fraction in mg/kg Absolute expanded uncertainty in mg/kg
automotive catalyst (ceramics) palladium 1000 to 4000 1.3E2 to 1.7E2 9.988 to 10.02 1.6E-2
  • Mechanism for measurement service delivery : Elemental analysis, CRM production
  • Approved on 04 August 2025
  • CMC ID : AFRIMETS-QM-EG-00000QI4-1
     
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
mass fraction mg/kg in mg/kg Relative expanded uncertainty in % mass fraction mg/kg in mg/kg Relative expanded uncertainty in %
General organic solvents (such as acetonitrile, methanol, etc) for calibration solutions patulin 10 to 100 3.5 10 to 100 3.5
  • Mechanism for measurement service delivery : CRM 065; Reference measurements and Preparation and value assignment of patulin calibration solutions
  • Approved on 11 August 2025
  • Institute service identifier : ORG-48R002
  • CMC ID : AFRIMETS-QM-EG-00000QCY-1
     
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Mass fraction in mg/kg Absolute expanded uncertainty in mg/kg Mass fraction in mg/kg Absolute expanded uncertainty in mg/kg
automotive catalyst platinum 1000 to 4000 1.0E2 to 1.2E2 9.979 to 10.013 1.7E-2
  • Mechanism for measurement service delivery : Elemental analysis, CRM production
  • Approved on 04 August 2025
  • CMC ID : AFRIMETS-QM-EG-00000QI3-1
     
Frequency , Frequency : 1 Hz to 1.20E8 Hz
Local frequency standard
Relative expanded uncertainty : 5.8E-13 Hz/Hz
Phase comparison
Measurement time : 1 d
Amplitude : 200 mV to 3.5 V (peak to peak)
Approved on 02 March 2012
Institute service identifier : NIS/TF05
CMC ID : AFRIMETS-TF-EG-0000060Z-1
 
Viscosity , Kinematic viscosity : 2.8 mm2/s2 to 97.94 mm2/s2
Newtonian liquids
Relative expanded uncertainty : 2.3 %
Capillary viscometer
Temperature : 20 °C to 25 °C
Approved on 19 October 2009
CMC ID : AFRIMETS-M-EG-000006YY-1
 
Pressure , Gauge pressure : 2.00E5 Pa to 5.00E6 Pa
Pressure balance
Absolute expanded uncertainty
32 + 2.5E-05p

p pressure in Pa

The uncertainty is expressed in Pa
Liquid medium
Approved on 24 August 2009
CMC ID : AFRIMETS-M-EG-000006YR-1
 
DC voltage (up to 1100 V) , DC voltage sources: single vaues : 1.018 V to 10 V
DC solid state voltage standard
Relative expanded uncertainty : 3.0E-2 µV/V to 0.2 µV/V
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded uncertainty / (µV/V)"},"row_2":{"col_1":"1 V","col_2":"0.20"},"row_3":{"col_1":"1.018 V","col_2":"0.20"},"row_4":{"col_1":"10 V","col_2":"0.03"}}
Direct Comparison with primary standard (JVS)
Temperature : 23 °C ± 2°C
Approved on 22 September 2017
Institute service identifier : 21.3.1
CMC ID : AFRIMETS-EM-EG-0000098C-1
 
Mass , Mass : 1 mg to 100 mg
Mass standard
Absolute expanded uncertainty : 0.5 µg to 1.2 µg
Comparison in air
Uncertainty scales with measurand level. The volume of the mass standards is known.
Approved on 25 November 2010
CMC ID : AFRIMETS-M-EG-000006YH-1
 
Mass , Mass : 1 kg to 10 kg
Mass standard
Absolute expanded uncertainty : 9.5E-2 mg to 3 mg
Comparison in air
Uncertainty scales with measurand level. The volume of the mass standards is known.
Approved on 25 November 2010
CMC ID : AFRIMETS-M-EG-000006YM-1
 
Pressure , Gauge pressure : 1.00E4 Pa to 4.00E7 Pa
Pressure balance
Absolute expanded uncertainty
70 + 3.3E-05p

p pressure in Pa

The uncertainty is expressed in Pa
Gas medium
Approved on 24 August 2009
CMC ID : AFRIMETS-M-EG-000006YQ-1
 
Complex geometry , Surface texture : 0.15 µm to 11 µm
groove depth (step height) standard
Absolute expanded uncertainty : 3.0E1 nm to 1.7E2 nm
Q[30 nm,15E-3 h]
Stylus profilometery
ISO 3274 (1996) - Type-A
Surface  Parameters : step height
Approved on 19 July 2021
Institute service identifier : 63-C/T-4101
CMC ID : AFRIMETS-L-EG-00000K2I-1
 
Radiations of the mise en pratique , Laser radiations : 778 nm
Frequency  Stabilized  laser vacuum wavelength
Absolute expanded uncertainty : 2.0E-2 fm
Optical beat frequency
O. Terra and H. Hussein, “An ultra-stable optical frequency standard for telecommunication purposes based upon the 5S1/2 → 5D5/2 two-photon transition in Rubidium”, Applied Physics B, 122: 27. doi:10.1007/s00340-015-6309-4 (2016).

O. Terra, “Absolute frequency measurement of the hyperfine structure of the 5S1/2 – 5D3/2 two-photon transition in rubidium using femtosecond frequency comb”, Measurement, Volume 144, (2019), Pages 83-87.
 
Approved on 12 March 2021
Institute service identifier : 61.C.003
CMC ID : AFRIMETS-L-EG-00000K2S-1
 
Items for disseminating ITS-90 and PLTS 2000 , Temperature : 660.323 °C
Thermocouple
Absolute expanded uncertainty : 0.35 °C
Pt/Pd
Approved on 19 November 2021
CMC ID : AFRIMETS-T-EG-00000MEL-1
 
Fluid flow , Volume of liquid : 10 µL to 100 µL
Micropipettes or piston pipettes
Absolute expanded uncertainty : 0.35 µL
Gravimetric
Liquid : Water
Reference temperature : 20 °C
Approved on 13 September 2021
Institute service identifier : 11C003
CMC ID : AFRIMETS-M-EG-00000MQH-1
 
Density , Density of liquid : 950 kg/m3 to 1850 kg/m3
Hydrometers
Absolute expanded uncertainty : 5.4E-2 kg/m3 to 7.4E-2 kg/m3
Cuckow method (Hydrostatic weighing)
Liquid temperature : 20 °C
Pressure : 101 kPa
‏
Approved on 11 May 2022
Institute service identifier : 13C010
CMC ID : AFRIMETS-M-EG-00000MYQ-1
 
Density , Density of solid : 7700 kg/m3 to 8400 kg/m3
Mass standard 1 kg
Absolute expanded uncertainty : 0.85 kg/m3
Hydrostatic weighing by weight comparison
Reference temperature : 20 °C
Approved on 11 May 2022
CMC ID : AFRIMETS-M-EG-00000N3A-1
 

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