Standard curve of ferric ions determination. Different concentrations of ferric ions were colorized with potassium thiocyanate. The value of absorbance at 480 nm was detected. The concentration scale is 0 to 200 mg/L. Each assay was performed in triplicates. Data are presented as means ± standard deviations.
Wu et al. Nanoscale Research Letters 2012 7:665 doi:10.1186/1556-276X-7-665