CCQM-K73.2018

 

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
Participating institutes

CCQM-K73.2018

 

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
mol/kg
mol/kg
CENAM 0.0000052 0.0000286
CMI -0.0000081 0.0000279
DFM -0.0000002 0.0000272
GUM 0.0000176 0.0000391
INM 0.000025 0.000176
INMETRO 0.0000134 0.0000634
INTI 0.00020 0.00027
KRISS 0.0000085 0.0000348
LNE 0.00017 0.00031
NIM 0.000007 0.000034
NMIJ 0.0000155 0.0000309
PTB -0.0000092 0.0000285
SMU -0.0000041 0.0000297
UME -0.000076 0.000035
UNIIM 0.000071 0.000047
VNIIFTRI 0.000076 0.000216
CENAM additional -0.0000037 0.0000406
KRISS additional 0.0000085 0.0000348
NIM additional 0.000005 0.000104
PTB additional 0.0000059 0.0000826
SMU additional 0.0000187 0.0000495
Participating institutes
CCQM-K73.2018
Comparison
Comparison close
CC comparison
Linked comparison
CCQM-K73.2018.1
Metrology area, Sub-field Chemistry and Biology, Electrochemistry
Description Amount content of H+ in an HCl solution
Time of measurements 2022
Status Planned
Measurand Amount content of strong acid
~ 0.1 mol/kg
Comparison type Key Comparison
Consultative Committee CCQM (Consultative Committee for Amount of Substance)
Conducted by CCQM (Consultative Committee for Amount of Substance)
Comments The key comparison CCQM-K73.2018.1 is a subsequent comparison to CCQM K73.2018. It will be performed to demonstrate the capability of the participating institutes to measure the amount content of H+ in a HCl solution with a nominal molality of 0.1 mol/kg.
Pilot institute SMU
Slovensky Metrologicky Ustav
Slovakia
Contact person Michal Mariassy

+421 2 602 94 522
Additional
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
SMU

Slovensky Metrologicky Ustav, Slovakia, EURAMET

SE "Ukrmetrteststandard"

State Enterprise "Ukrmetrteststandard", Ukraine, COOMET

CCQM-K73.2018

 

MEASURAND   Amount content of H+ in hydrochloric acid solutions

NOMINAL VALUE 0.1 mol/kg

 

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.

 

CCQM-K73.2018

 

MEASURAND   Amount content of H+ in hydrochloric acid solutions

NOMINAL VALUE 0.1 mol/kg

 

xi   measurement value reported by laboratory iLabi

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

Labi xi* ULabi kLabi
  mol/kg mol/kg  
CENAM 0.1001164 0.0000057 2.076
CMI 0.1001031 0.0000053 2.028
DFM 0.1001110 0.0000032 2.000
GUM 0.100129 0.000028 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 0.1001020 0.0000083 2.019
SMU 0.1001071 0.0000122 2.000
UME 0.100035 0.000015 2.012
UNIIM 0.100182 0.000038 2.869
VNIIFTRI 0.100187 0.000212 2.012
* corrected for drift    

 

 

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