Pengaruh Penambahan Al3+ dalam Penentuan Analisa Fe2+ pada pH 4,5 dengan Pengompleks 1,10-Fenantrolin Secara Spektrofotometri Sinar Tampak

Andreana Rifki, Djarot Sugiarso
Submission Date: 2013-08-07 06:25:58
Accepted Date: 2013-09-20 17:25:40

Abstract


Penentuan analisa besi menggunakan instrument spektrofotometer sinar tampak, dimana besi dikomplekskan dengan menggunakan ligan 1,10-fenantrolin. Sebelum dikomplekskan, Fe3+ direduksi terlebih dahulu menjadi Fe2+ dengan pereduksi natrium tiosulfat akan membentuk kompleks Fe2+ dengan 1,10-fenantrolin yang memberikan serapan di daerah visible pada panjang gelombang 507 nm dengan penampakan warna merah orange. Analisa penentuan Fe2+ dengan pengompleks 1,10-fenantrolin ditambahkan ion Al3+ pada kondisi pH 4,5. Penambahan Al3+ mulai mengganggu analisa besi pada saat penambahan 0,122 ppm dengan persen recovery sebesar 90,74%.

Keywords


1,10-Fenantrolin; Fe3+; Fe2+; Al3+; Natrium Tiosulfat; Spektrofotometer Sinar Tampak.

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