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

Muhammad Rizky Mulyana,Oman Zuas,Harry Budiman

doi:10.29303/jppipa.v6i2.444

Muhammad Rizky Mulyana, Oman Zuas + Show 1 more

Open Access

https://doi.org/10.29303/jppipa.v6i2.444

Copy DOI

Abstract

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.

Highlights

Reference Material (RM), is a material made and verified by certain procedures resulting in a valid and traceable composition
___________ Email: oman@bsn.go.id using traceable reference material prior to utilization in routine testing (Badan Standardisasi Nasional, 2017). This rule applies to all kinds of measurements, including those related to gases such as air quality, greenhouse gases, vehicle emissions, and many others, in which the validity is determined by the quality of the gas Certified Reference Material (CRM) used
N is the number of components in the gas RM mixture, mA is the mass of parent gas A which has been transferred into the gas RM cylinder, Mi is the molecular mass of component i, and xi,A is the concentration of component i in parent gas A (International Organization for Standardization, 2002a; Mulyana et al, 2018)

Summary

Introduction

Reference Material (RM), is a material made and verified by certain procedures resulting in a valid and traceable composition. Through a series of certification processes by an accredited institution or company, the reference material can be referred to as a Certified Reference Material (CRM). It plays an important role in determining the quality of measurement or testing results based on SNI ISO/IEC 17025: 2017 - "General Requirements for Competence of Testing Laboratories and Calibration Laboratories". It became of great importance to various local testing laboratories related to gas measurement, both government or privately owned, in order to meet the accreditation requirements of SNI ISO/IEC 17025: 2017. A number of local companies have gained the capability to produce their own gas CRMs, with a relatively limited number of Jurnal Penelitian Pendidikan IPA (JPPIPA)

Methods

Discussion

Conclusion