Penentuan Kadar Tembaga (Cu) dalam Sampel Batuan Mineral

M. Anugrah Rizky Pambudi, Suprapto Suprapto
Submission Date: 2018-05-31 20:27:56
Accepted Date: 2019-05-29 15:31:18

Abstract


Telah dilakukan penentuan kadar tembaga (Cu) dalam batuan mineral. Batuan mineral ini dianalisis kandungan tembaga (Cu didalamnya menggunakan instrumen Flame Atomic Absorption Spectrophotometry (FAAS). Sampel dilakukan preparasi dengan metode destruksi basah menggunakan larutan HNO3 pekat. Dalam analisis kadar tembaga (Cu), dibuat kurva standar untuk mengetahui hubungan antara konsentrasi larutan dengan nilai absorbansi sehingga konsentrasi sampel dapat ditentukan. Larutan standar 2 ppm, 4 ppm, 6 ppm, 8 ppm, dan 10 ppm dibuat dengan metode pengenceran bertingkat larutan stock yang dibuat dari padatan Cu(NO3)2.3H2O. Regresi kurva kalibrasi yang didapat sebesar 0,9995. Berdasarkan hasil perhitungan, diperoleh kadar Cu dalam sampel batuan sebesar 2,189 ppm atau 21,66%.

 


Keywords


Konsentrasi; logam Cu; Absorbansi; Spektrofotometer AAS

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