Mulyana MR, Budiman H, Zuas O. Implementation of ISO 6142- Gas Analysis - Preparation of Calibration Gas Mixtures - Gravimetric Method: Composition Determination and Uncertainty Estimation of Gas Reference Material. jppipa, pendidikan ipa, fisika, biologi, kimia [Internet]. 2020 Jul. 10 [cited 2024 Nov. 23];6(2):221-6. Available from: https://jppipa.unram.ac.id/index.php/jppipa/article/view/444