Perbandingan Reduktor Hidroksilamin Hidroklorida dan Natrium Oksalat dalam Penentuan Fe Menggunakan Spektrofometer UV-Vis dengan Pengganggu Ion Mn2+

Abstract

Penelitian analisis gangguan ion Mn2+ dalam penentuan Fe(II) fenantrolin dengan pereduksi natrium oksalat dan hidroksilamin pada kondisi optimum menggunakan sprektofotometer UV-vis telah berhasil dilakukan. Kompleks Fe(II) fenantrolin memiliki panjang gelombang pada 511 nm untuk kedua reduktor. Pengukuran kurva kalibrasi pada reduktor natrium oksalat memiliki nilai koefisien determinasi (r2) sebesar 0,9989. Pada reduktor hidroksilamin hidroklorida kurva kalibrasi didapatkan nilai koefisien determinasi sebesar 0,9957. Ion Mn2+ dapat mengganggu analisa Fe(II) fenantrolin dengan menurunkan absorbansi besi. Pada reduktor natrium oksalat, Mn2+ mulai mengganggu saat konsentrasi Mn2+ 0,4 ppm dengan %recovery 93,45%, sedangkan pada reduktor hidroksilamin hidroklorida Mn2+ mulai mengganggu pada konsentrasi 2 ppm dengan %recovery sebesar 94,89%.

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