Figure 1.

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
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