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The Spectrophotometric Determination of Nystatin in Real Samples Using Solid Phase Extraction Based on Sodium Dodecyl Sulphate-Coated Magnetite Nanoparticles

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Figure

Fig. 4. Effect of  pH  on  extraction efficiency. Sample volume: 10 ml, sample  concentration: 5 mg l   -1, adsorbent             amount: 20 mg, extraction time: 5 min, eluent:2 ml methanol: NaOH (60:40, v/v), desorption time: 2 min
Fig. 6. Effect of the extraction time. Sample volume: 10 ml, sample pH = 5, sample concentration: 5 mg l adsorbent amount: 20 mg, eluent: 2 ml methanol: NaOH (60:40, v/v), desorption time: 2 min

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