CAJ | 학술논문

研究了在硫酸介质中,约 pH=3~4时, Fe(III)催化过氧化氢氧化乙基紫体系褪色反应的最佳条件,建立了高灵敏度测定痕量铁的新方法。研究确定了反应的最佳实验条件：最大吸收波长580 nm,最佳温度100℃,最佳反应时间8 min,线性范围：0~0.8μg/25 mL,检出限4.0×10-10 g·mL-1,该方法仪器设备简单,检测手续简便、快速且具有校好的选择性和重现性,同时与原子吸收法进行了比较,分析结果可靠,应用于水果中痕量铁的测定,结果令人满意。
연구료재류산개질중,약 pH=3~4시, Fe(III)최화과양화경양화을기자체계퇴색반응적최가조건,건립료고령민도측정흔량철적신방법。연구학정료반응적최가실험조건：최대흡수파장580 nm,최가온도100℃,최가반응시간8 min,선성범위：0~0.8μg/25 mL,검출한4.0×10-10 g·mL-1,해방법의기설비간단,검측수속간편、쾌속차구유교호적선택성화중현성,동시여원자흡수법진행료비교,분석결과가고,응용우수과중흔량철적측정,결과령인만의。
A new method for the determination of trace iron, Fe(III) catalytic decoloring spectrophotometry, was described. The method, which had high sensitivity and selectivity for determining trace iron, was found by the research of the best condition in which the Iron catalyzed the decolorization reaction of hydrogen peroxide and ethyl violet in the sulfuric acid medium. The optimum reaction conditions of the determination were studied as follows: the optimum wavelength was 580 nm, the optimum temperature was 100 ℃, the optimum reaction time was 8 min, the linear range of the determination was 0 ~ 0. 8 μg / 25 mL and the detection limit for iron was 4×10-10 g·mL-1 . This method used the simple apparatus, and convenient and fast testing procedures, and had good selectivity and reproducibility. At the same time, it was compared with flame atomic absorption spectrophotometry, applied to the fruit in the determination of iron, with satisfactory results.