CCQM-K172

MEASURAND   Specific Adsorption of Ar on zeolite at P/Po = 0.0001

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mol/kg.

Specific adsorption of Ar at P/Po=0.0001
Di / mol/kg
Participating institutes

CCQM-K172

MEASURAND   Specific Adsorption of Ar on zeolite at P/Po = 0.001

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mol/kg.

Specific adsorption of Ar at P/Po=0.001
Di / mol/kg
Participating institutes

CCQM-K172

MEASURAND   Specific Adsorption of Ar on zeolite at P/Po = 0.01

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mol/kg.

Specific adsorption of Ar at P/Po=0.01
Di / mol/kg
Participating institutes

CCQM-K172

MEASURAND   Specific Adsorption of Ar on zeolite at P/Po = 0.1

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mol/kg.

Specific adsorption of Ar at P/Po=0.1
Di / mol/kg
Participating institutes

CCQM-K172

MEASURAND   BET specific surface area

 

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in m2/g.

BET Specific surface area
Di / m2/g
Participating institutes

CCQM-K172

MEASURAND   Specific Adsorption of Ar on zeolite at P/Po = 0.0001

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mol/kg.

LABi Di Uneg,i Upos,i
mol/kg
mol/kg
mol/kg
UME -0.13 0.13
INMETRO -0.06 0.13
VNIIM 0.01 0.10
BAM 0.09 0.10
NIM 0.11 0.15
Participating institutes
CCQM-K172

CCQM-K172

MEASURAND   Specific Adsorption of Ar on zeolite at P/Po = 0.001

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mol/kg.

LABi Di Uneg,i Upos,i
mol/kg
mol/kg
mol/kg
INMETRO -0.54 0.26
BAM -0.11 0.12
VNIIM -0.06 0.12
NIM 0.04 0.14
UME 0.12 0.19
Participating institutes
CCQM-K172

CCQM-K172

MEASURAND   Specific Adsorption of Ar on zeolite at P/Po = 0.01

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mol/kg.

LABi Di Uneg,i Upos,i
mol/kg
mol/kg
mol/kg
INMETRO -0.64 0.31
BAM -0.11 0.13
VNIIM -0.02 0.13
UME 0.02 0.26
NIM 0.10 0.17
Participating institutes
CCQM-K172

CCQM-K172

MEASURAND   Specific Adsorption of Ar on zeolite at P/Po = 0.1

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mol/kg.

LABi Di Uneg,i Upos,i
mol/kg
mol/kg
mol/kg
INMETRO -0.57 0.57
BAM -0.13 0.16
UME -0.02 0.33
VNIIM -0.01 0.16
NIM 0.15 0.19
Participating institutes
CCQM-K172

CCQM-K172

MEASURAND   BET specific surface area

 

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in m2/g.

LABi Di Uneg,i Upos,i
m2/g
m2/g
m2/g
INMETRO -49.7 37.3
BAM -7.7 12.1
VNIIM -2.9 12.3
UME -0.8 31.1
NIM 11.3 14.5
Participating institutes
CCQM-K172
Comparison
Comparison close
CC comparison
Linked comparison
CCQM-K172
Metrology area, Sub-field Chemistry and Biology, Surface
Description Specific Adsorption of Ar on zeolite
Time of measurements 2020 - 2021
Status Approved for equivalence
Final Reports of the comparisons
References

CCQM-K172 Technical protocol

Measurand Specific adsorption
(1-20) mol/kg; (500-1500) m2/g
Transfer device Bottle containing 4 g of zeolite
Comparison type Key Comparison
Consultative Committee CCQM (Consultative Committee for Amount of Substance)
Conducted by CCQM (Consultative Committee for Amount of Substance)
Comments Results published on 17 February 2023
Pilot institute VNIIM
D.I. Mendeleyev Institute for Metrology, Rosstandart
Russian Federation
Contact person Egor SOBINA

+7 343 3502618
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
VNIIM

D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET

BAM

Bundesanstalt für Materialforschung und -prüfung, Germany, EURAMET

INMETRO

Instituto Nacional de Metrologia, Qualidade e Tecnologia, Brazil, SIM

NIM

National Institute of Metrology, China, APMP

UME

TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET

CCQM-K172

 

MEASURAND   Specific Adsorption of Ar on zeolite at P/Po = 0.0001

 

The key comparison reference value xR and its associated standard uncertainty u are calculated as the mean of the reported values of specific adsorption of Ar at P/Po=0.0001:

 

        xR = 1.480 mol/kg     uR = 0.034 mol/kg

 

The degree of equivalence of laboratory i relative to the key comparison reference value xR is given by a pair of terms, both expressed in mol/kg:

Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence where Ui = (ULabi 2 +2uR2)1/2

 

CCQM-K172

 

MEASURAND   Specific Adsorption of Ar on zeolite at P/Po = 0.001

 

The key comparison reference value xR and its associated standard uncertainty u are calculated as the mean of the reported values of specific adsorption of Ar at P/Po=0.0001, excluding INMETRO results:

 

        xR = 7.248 mol/kg     uR = 0.051 mol/kg

 

The degree of equivalence of laboratory i relative to the key comparison reference value xR is given by a pair of terms, both expressed in mol/kg:

Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence where Ui = (ULabi 2 +2uR2)1/2

 

CCQM-K172

 

MEASURAND   Specific Adsorption of Ar on zeolite at P/Po = 0.01

 

The key comparison reference value xR and its associated standard uncertainty u are calculated as the mean of the reported values of specific adsorption of Ar at P/Po=0.0001, excluding INMETRO results:

 

        xR = 9.048 mol/kg     uR = 0.044 mol/kg

 

The degree of equivalence of laboratory i relative to the key comparison reference value xR is given by a pair of terms, both expressed in mol/kg:

Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence where Ui = (ULabi 2 +2uR2)1/2

 

CCQM-K172

 

MEASURAND   Specific Adsorption of Ar on zeolite at P/Po = 0.1

 

The key comparison reference value xR and its associated standard uncertainty u are calculated as the mean of the reported values of specific adsorption of Ar at P/Po=0.0001, excluding INMETRO results:

 

        xR = 9.868 mol/kg     uR = 0.058 mol/kg

 

The degree of equivalence of laboratory i relative to the key comparison reference value xR is given by a pair of terms, both expressed in mol/kg:

Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence where Ui = (ULabi 2 +2uR2)1/2

 

CCQM-K172

 

MEASURAND   BET specific surface area

 

The key comparison reference value xR and its associated standard uncertainty u are calculated as the mean of the participants' reported values of  BET specific surface area, excluding INMETRO results:

 

        xR = 793.7 m2/g     uR = 4.0 m2/g

 

The degree of equivalence of laboratory i relative to the key comparison reference value xR is given by a pair of terms, both expressed in m2/g:

Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence where Ui = (ULabi 2 +2uR2)1/2

 

CCQM-K172

 

MEASURAND   Specific Adsorption of Ar on zeolite at P/Po = 0.0001

 

xi   measurement value reported by laboratory iLabi

ui   combined standard uncertainty of xi

kLabi coverage factor reported by laboratory i,

ULabi   expanded uncertainty of xi at 95 % level of confidence where Ui = kLabiui

 

  Labi xi ui kLabi ULabi
    mol/kg mol/kg   mol/kg
  UME 1.320 0.045 2 0.090
  INMETRO 1.390 0.047 2.57 0.120
  VNIIM 1.460 0.020 2 0.040
  BAM 1.540 0.020 2 0.040
  NIM 1.560 0.060 2 0.120

 

 

CCQM-K172

 

MEASURAND   Specific Adsorption of Ar on zeolite at P/Po = 0.001

 

xi   measurement value reported by laboratory iLabi

ui   combined standard uncertainty of xi

kLabi coverage factor reported by laboratory i,

ULabi   expanded uncertainty of xi at 95 % level of confidence where Ui = kLabiui

 

  Labi xi ui kLabi ULabi
    mol/kg mol/kg   mol/kg
  INMETRO 6.710 0.121 2.31 0.280
  BAM 7.140 0.035 2 0.070
  VNIIM 7.190 0.035 2 0.070
  NIM 7.290 0.050 2 0.100
  UME 7.370 0.080 2 0.160

 

 

CCQM-K172

 

MEASURAND   Specific Adsorption of Ar on zeolite at P/Po = 0.01

 

xi   measurement value reported by laboratory iLabi

ui   combined standard uncertainty of xi

kLabi coverage factor reported by laboratory i,

ULabi   expanded uncertainty of xi at 95 % level of confidence where Ui = kLabiui

 

  Labi xi ui kLabi ULabi
    mol/kg mol/kg   mol/kg
  INMETRO 8.410 0.150 2.26 0.340
  BAM 8.940 0.050 2 0.100
  VNIIM 9.030 0.045 2 0.090
  UME 9.070 0.120 2 0.240
  NIM 9.150 0.075 2 0.150

 

CCQM-K172

 

MEASURAND   Specific Adsorption of Ar on zeolite at P/Po = 0.1

 

xi   measurement value reported by laboratory iLabi

ui   combined standard uncertainty of xi

kLabi coverage factor reported by laboratory i,

ULabi   expanded uncertainty of xi at 95 % level of confidence where Ui = kLabi ui

  Labi xi ui kLabi ULabi
    mol/kg mol/kg   mol/kg
  INMETRO 9.300 0.278 2.16 0.600
  BAM 9.740 0.055 2 0.110
  UME 9.850 0.155 2 0.310
  VNIIM 9.860 0.055 2 0.110
  NIM 10.020 0.075 2 0.150

CCQM-K172

 

MEASURAND   BET specific surface area

 

xi   measurement value reported by laboratory iLabi

ui   combined standard uncertainty of xi

kLabi coverage factor reported by laboratory i,

ULabi   expanded uncertainty of xi at 95 % level of confidence where Ui = kLabi ui

 

  Labi xi ui kLabi ULabi
    m2/g m2/g   m2/g
  INMETRO 744.0 18.2 2.14 39.0
  BAM  786.0 4.5 2 9.0
  VNIIM 790.8 4.7 2 9.3
  UME 792.9 15.0 2 30.0
  NIM  805.0 6.0 2 12.0