Implementation of ISO 6142- Gas Analysis - Preparation of Calibration Gas Mixtures - Gravimetric Method: Composition Determination and Uncertainty Estimation of Gas Reference Material

Autor(s): Muhammad Rizky Mulyana, Harry Budiman, Oman Zuas
DOI: 10.29303/jppipa.v6i2.444


Reference material plays an important role in determining the validity of measurement results based on SNI ISO/IEC 17025: 2017. In order to obtain a valid and accurate composition, the standard procedure for making gas reference material has been regulated in ISO 6142. Thus, this article will discuss in detail about the determination of the reference material composition along with its uncertainty based on ISO 6142. Starting with the results of a precise weighing, the concentration of each component of the gas reference material is determined gravimetrically and verified by analytical methods, one of which is gas chromatography (GC). The concentration uncertainty of each component is a combination of the contribution from repeatability of the weighing results, the uncertainty of the composition of the gas raw material, the molecular mass of the gas component, and the total uncertainty of the reference material verification. It is hoped that the detailed discussion in this article can improve the competence of stakeholders in the field of gas measurement in determining the composition of gas reference material concentrations and estimating uncertainty.


Gas reference material; uncertainty evaluation; ISO 6142

Full Text:



Badan Standardisasi Nasional. (2016). SNI ISO 17034:2016 – “Persyaratan Umum Kompetensi Produsen Bahan Acuan.” Jakarta: Badan Standardisasi Nasional.

Badan Standardisasi Nasional. (2017). SNI ISO/IEC 17025:2017 – “Persyaratan Umum Kompetensi Laboratorium Pengujian dan Laboratorium Kalibrasi.” Jakarta: Badan Standardisasi Nasional.

Budiman, H., Mulyana, M. R., & Zuas, O. (2017). Toward their uncertainty estimation Gravimetric Dilution of Calibration Gas Mixtures ( CO 2 , CO , and CH 4 in He Balance ): Toward Their Uncertainty Estimation, 020056.

International Organization for Standardization. (2002a). ISO 6142 - “Gas Analysis - Preparation of Calibration Gas Mixtures - Gravimetric Method.” International Organization for Standardization.

International Organization for Standardization. (2002b). ISO 6143 - “Gas analysis - Comparison methods for determining and checking the compposition of calibration gas mixtures.” International Organization for Standardization.

Milton, M. J. T., Vargha, G. M., & Brown, A. S. (2011). Gravimetric methods for the preparation of standard gas mixtures. Metrologia, 48(5), R1–R9.

Mulyana, M. R., Budiman, H., Zuas, O., & Darmayanti, N. T. E. (2018). Ketidakpastian Pengukuran: Evaluasi, Sumber-Sumber dan Kontribusinya dalam Pembuatan Bahan Acuan Campuran Gas (N2O dalam Matriks N2) Secara Gravimetri. Jurnal Standardisasi, 20(1), 19–32.

Mulyana, M. R., Budiman, H., Zuas, O., & Hindayani, A. (2019). Trace impurities measurement in ultra-high purity gases and their uncertainties: Case study on permanent gas impurities in pure nitrogen. Journal of Physics: Conference Series, 1153(1).

Mulyana, M. R., & Zuas, O. (2017). Penentuan Komposisi Gravimetrik Bahan Acuan Gas Biner dan Estimasi Ketidakpastiannya. Buletin Metrologi Kimia Indonesia, (1), 51–60.

Mulyana, M. R., Zuas, O., & Budiman, H. (2017). Studi Pengujian Kontainer Bahan Acuan Gas (Berbentuk Silinder): Kasus Gas CO2 dalam N2 Matriks. In Pertemuan dan Presentasi Ilmiah Kalibrasi, Instrumentasi dan Metrologi (PPI KIM) ke-43 (pp. 104–114).

Wang, D., Zhou, Z., & Zhao, Y. (2008). Uncertainty Calculation of Gas Mixture Prepared by Gravimetric Method. In 6th Workshop of APMP/TCQM Gas Analysis Working Group. Daejeon.

Wieser, M. E., Holden, N., Coplen, T. B., Böhlke, J. K., Berglund, M., Brand, W. A., … Zhu, X.-K. (2010). Atomic weights of the elements 2011 (IUPAC Technical Report). Pure and Applied Chemistry, 83(2), 2012.

Zuas, O., Mulyana, M. R., Budiman, H., Hindayani, A., Styarini, D., Herwahyu Krismastuti, F. S., & Sirenden, B. H. (2019). Development of metrology for gas analysis at the Research Centre for Metrology-Indonesian Institutes of Sciences. In IOP Conference Series: Materials Science and Engineering (Vol. 536).


  • There are currently no refbacks.