Pengaruh Kontribusi Ketidakpastian Terhadap Pelaporan Nilai Porositas Menggunakan Metode Gravimetri
DOI:
https://doi.org/10.25077/jif.9.2.97-102.2017Abstract
Metode gravimetri berhasil diterapkan untuk menentukan nilai porositas batu kapur. Metode tersebut dilakukan dengan menggunakan timbangan standar terkalibrasi dan gelas ukur terkalibrasi untuk menentukan volume pori dan volume total dari sampel batu kapur. Porositas ditentukan dari hasil perbandingan antara volume pori dan volume total tersebut. Nilai ketidakpastian tipe A dibandingkan dengan hasil perhitungan ketidakpastian gabungan (Ugab) dengan menambahkan ketidakpastian tipe B yang bersumber dari sertifikat gelas ukur, timbangan dan temperatur. Hasilnya menunjukkan bahwa ketidakpastian tipe B menjadi penyebab utama meningkatnya nilai ketidakpastian pengukuran porositas batu kapur hingga 6%. Namun ketidakpastian tipe B seringkali diabaikan pada pelaporan hasil pengukuran.
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Kata kunci : Ketidakpastian, Porositas, Gravimetri
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