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<![CDATA[Unknown Affiliation]]>
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<![CDATA[Syiah Kuala University]]>
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<![CDATA[Unknown Affiliation]]>
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<![CDATA[Unknown Affiliation]]>
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<![CDATA[Unknown Affiliation]]>
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<![CDATA[Program Studi Kimia Analisis, Akademi Teknologi Industri Padang]]>
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<![CDATA[Unknown Affiliation]]>
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<![CDATA[Program Studi Kimia Analisis, Akademi Teknologi Industri Padang]]>
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<![CDATA[Jurnal Ilmiah Pena: Sains dan Ilmu Pendidikan]]>
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<![CDATA[STMIK Amik Riau]]>
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