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CCQM-K73.2018 and CCQM-K73.2018.2

 

MEASURAND   Amount content of H+ in hydrochloric acid solutions

NOMINAL VALUE 0.1 mol/kg

 

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

Molar amount content of H+ in 0.1 mol/kg hydrochloric acid
Di / mol·kg-1
Participating institutes

Enlarged Graph

Graph CCQM-K73.2018.2

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CCQM-K73.2018 and CCQM-K73.2018.2

 

MEASURAND   Amount content of H+ in hydrochloric acid solutions

NOMINAL VALUE 0.1 mol/kg

 

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-1
mol·kg-1
mol·kg-1
CENAM 0.00001 0.00003
CMI -0.00001 0.00003
DFM 0.00000 0.00003
GUM 0.00002 0.00004
INM 0.00003 0.00018
INMETRO 0.00001 0.00006
INTI 0.00020 0.00027
KRISS 0.00001 0.00003
LNE 0.00017 0.00031
NIM 0.00001 0.00003
NMIJ 0.00002 0.00003
PTB -0.00001 0.00003
SMU 0.00000 0.00003
UME -0.00008 0.00004
UNIIM 0.00007 0.00005
VNIIFTRI 0.00008 0.00022
CENAM additional 0.00000 0.00004
KRISS additional 0.00001 0.00003
NIM additional 0.00001 0.00010
PTB additional 0.00001 0.00008
SMU additional 0.00002 0.00005
SE"Ukrmetrteststandard" -0.00005 0.00013
INMETRO 0.00532 0.00003
INMETRO additional 0.00166 0.00012
Participating institutes
CCQM-K73.2018
CCQM-K73.2018.2
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CCQM-K73.2018.4
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Metrology area, Sub-field Chemistry and Biology, Electrochemistry
Description Amount content of H+ in an HCl solution
Time of measurements 2025
Status Planned
Measurand Amount content of strong acid
Comparison type Key Comparison
Consultative Committee CCQM (Consultative Committee for Amount of Substance)
Conducted by CCQM (Consultative Committee for Amount of Substance)
Pilot institute PTB
Physikalisch-Technische Bundesanstalt
Germany
Contact person Frank Bastkowski
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
PTB

Physikalisch-Technische Bundesanstalt, Germany, EURAMET

BFKH

Government Office of the Capital City Budapest, Hungary, EURAMET

INMETRO

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

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CCQM-K73.2018 and CCQM-K73.2018.2

 

MEASURAND   Amount content of H+ in hydrochloric acid solutions

NOMINAL VALUE 0.1 mol/kg

 

CCQM-K73.2018

The key comparison reference value xR and its associated standard uncertainty uR are computed user the DerSimonian Laird estimator of the reported results

        xR = 0.1001112 mol/kg     uR = 0.0000081 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 = 2 ui.

 

 

Linking CCQM-K73.2018.2 to CCQM-K73.2018

SMU provides the link between the key comparison CCQM-K73.2018.2 and CCQM-K73.2018, having participated in both comparisons. The linking process is described in page 8 and 9 of the CCQM-K73.2018.2 Final report.

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CCQM-K73.2018 and CCQM-K73.2018.2

 

MEASURAND   Amount content of H+ in hydrochloric acid solutions

NOMINAL VALUE 0.1 mol/kg

 

xi   measurement value reported by laboratory i, Labi

ui            combined standard uncertainy of xi

kLabi  coverage factor reported by laboratory i,

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

 

CCQM-K73.2018

  Labi xi* ULabi kLabi
  mol/kg mol/kg  
  CENAM 0.1001164 0.0000057 2.076
  CMI 0.1001031 0.0000053 2.028
  DFM 0.100111 0.0000032 2.000
  GUM 0.1001287 0.0000282 2.000
  INM 0.100136 0.000173 2.366
  INMETRO 0.1001245 0.0000569 2.072
  INTI 0.10031 0.00026 2.429
  KRISS 0.1001197 0.0000114 2.429
  LNE 0.10028 0.00031 2.366
  NIM 0.100118 0.000015 2.212
  NMIJ 0.1001267 0.0000122 2.105
  PTB 0.100102 0.0000083 2.019
  SMU 0.1001071 0.0000122 2.000
  TUBITAK UME 0.100035 0.000015 2.012
  UNIIM 0.100182 0.000038 2.869
  VNIIFTRI 0.100187 0.000212 2.012

 

* corrected for drift

 

CCQM-K73.2018 Diluted HCl

  Labi xi* ULabi kLabi
  mol/kg mol/kg  
  CENAM 0.1001075 0.0000142 2.140
  KRISS 0.1001197 0.0000114 2.429
  NIM 0.100116 0.000093 2.649
  PTB 0.1001171 0.0000743 2.025
  SMU 0.1001299 0.0000345 2.000

**result of diluted solution, corrected for drift

 

CCQM-K73.2018.2

  Labi xi* ULabi kLabi
  mol/kg mol/kg  
  SMU 0.100454667 0.000008 2.000
  SE"Ukrmetrteststandard" 0.100410418 0.00015 2.320
  INMETRO 0.10577854 0.000013 2.520

* corrected for drift

 

CCQM-K73.2018.2 Diluted HCl

  Labi xi** ULabi kLabi
  mol/kg mol/kg  
  INMETRO 0.102117 0.000140 2.43

**result of diluted solution, corrected for drift