Studi Gangguan Mg(II) dalam Analisa Besi(II) dengan Pengompleks O-fenantrolin Menggunakan Spektrofotometri UV-Vis

Novita Sari, Djarot Sugiarso
Submission Date: 2015-02-03 14:14:25
Accepted Date: 2015-03-16 09:16:43


Pada penelitian ini telah dilakukan studi gangguan ion Mg(II) terhadap analisa besi dengan pengompleks o-fenantrolin pada pH 4,5 secara spektrofotometri UV-tampak. Penelitian dilakukan dengan mereduksi Besi (III) menjadi Besi (II) menggunakan natrium tiosulfat, kemudian dikomplekskan dengan o-fenantrolin pada kondisi pH 4,5. Kompleks diukur panjang gelombang maksimumnya menggunakan spektrofotometer UV-Vis, selanjutnya dibuat kurva kalibrasi, dan diuji pengaruh ion Mg(II) terhadap analisa besi. Hasil menunjukkan bahwa ion Mg(II) mulai mengganggu analisa besi pada konsentrasi 0,04 ppm dengan persen (%) recovery sebesar 90,99% dengan Relatif Standar Deviasi (RSD) 2,24 ppt dan Koefisien Variasi (CV) 0,224%. 


Besi; Spektrofotometer UV-tampak; Natrium Tiosulfat; 1,10-Fenantrolin


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