用聚六亚甲基胍和铁改性二氧化硅逐层吸附光度法测定天然水中的铁(III)

IF 0.5 Q4 CHEMISTRY, MULTIDISCIPLINARY Journal of Siberian Federal University. Chemistry Pub Date : 2020-09-01 DOI:10.17516/1998-2836-0188
S. Didukh-Shadrina, O. Buyko, V. Losev
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引用次数: 1

摘要

提出了以聚六亚甲基胍和7-碘-8-羟基喹啉-5-磺酸(铁)依次修饰的二氧化硅基吸附剂,用于天然水中铁(III)的吸附光度测定。在pH为2.0 ~ 3.5的吸附剂中,Fe(III)在吸附过程中呈绿色。利用Fe(III)与铁形成的漫反射光谱最大值为600 nm的绿色表面配合物,建立了吸附光度法测定Fe(III)的方法。3s标准计算的检出限为0.03 μg/0.1 g吸附剂(从10 mL溶液中吸附为3 μg/L);分析范围为10 ~ 220 μg/L。提出了一种在不同试验尺度下快速测定天然水中铁(III)的试验方法。对克拉斯诺亚尔斯克克天然河水和扎戈里矿泉水中铁的测定方法进行了试验。
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Adsorption-Photometric and Test-Determination of Fe(III) in Natural Water Using Silica Lyer-by-Lyer Modified with Polyhexamethylene Guanidine and Ferron
Silica based adsorbent sequentially modified with polyhexamethylene guanidine and 7-iodine-8-hydroxyquinoline-5-sulfonic acid (Ferron) was proposed for adsorption-photometric and test-determination of Fe(III) in natural water. During adsorption of Fe(III) from solutions with pH 2.0-3.5 adsorbent became green colored. Formation of green-colored surface complex of Fe(III) with Ferron with the maximum in diffuse reflectance spectrum at 600 nm was used for developing the procedure of its adsorption-photometric determination. Detection limit calculated by 3s-criterion was 0.03 μg/0.1 g of adsorbent (3 μg/L if the adsorption was carried out from 10 mL of solution); the analytical range was 10 – 220 μg/L. Test-method was proposed for quick visual determination of Fe(III) in natural water in the variant of test-scale. Developed procedures were tested for determination of iron in natural river water of Krasnoyarskii kray and mineral water “Zagorie”
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