STUDI OPTIMASI PENENTUAN UNSUR HARA BESI DALAM CAMPURAN TANAH DAN KOMPOS MENGGUNAKAN METODE SPEKTROFOTOMETRI
ABSTRACT: Determination of
iron nutrient content in a mixture of soil and compost with spectrophotometric method
has been carried out. Metal ions Fe(II) complexed with 0.1% ortho-fenantrolin 2
mL,0.01 M citric acid as reducing agent using acetat buffer at pH 4.5 and its
complex wasmeasured by using spectrophotometer UV/Vis at wavelength 515 nm, the
complex stability forwas 60 minutes . The highest nutrient of iron with content
in soil:compost with ratio of 0.8:0.2 was 0.92% at incubation time 30 days. The
lowest iron content in the mixture of soil:compost (1:0) at incubation time for
15 days was 0.58% that obtained by the regression equation y =95.85x + 0.025
with R2=0.992. The level of nutrient iron in compost obtained lower than themaximum
regulated by SNI 2.00%.
Penulis: Refilda, Suhartini
and Indrawati
Kode Jurnal: jpkimiadd150672
