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Typical chromatogram of free cyanide obtained by IC-PAD method under the following conditions. The elution was set as 50% 100 mM sodium hydroxide solution and 50% 500 mM sodium acetate (with 0.5% ethylene diamine, v/v). Flow rate: 1.0 ml min−1, injection volume: 25 µl, column temperature: 30°C, detection waveform table 1. Cyanide concentration: 7 µg kg−1.
