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化学学报
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化学学报 ›› 1988, Vol. 46 ›› Issue (10): 1035-1038. 上一篇    下一篇

研究论文

一种新的测定锶的高选择性光工法的研究: 用新显色剂DBC-偶氮氯膦测定合金及海水中的锶

赵也平;任英   

  1. 中国科学院长春应用化学研究所
  • 发布日期:1988-10-15

Studies on determination of strontium by a new highly selective spectrophotometry: Determination of strontium in alloy and sea water with chlorophosphonazo-DBC

ZHAO YEPING;REN YING   

  • Published:1988-10-15

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研究了新型显色剂二溴-氯偶氮氯膦与锶的显色反应及锶的分析, 发现锶能与这一显色剂在酸性条件下生成一种稳定的蓝紫色配合物, 在丙酮、EATA和硫酸钠存在下, 采用双波长分光光度法可有效地解决钙, 钡, 镁, 铁等三十余种元素的干扰, 用本方法测定了海水、氧化镁试剂和硅铁合金中的锶, 取得满意结果.

关键词: 分光光度法, 有机溴化合物, 锶, 海水, 显色反应, 有机氯化合物, 氧化镁, 偶氮氯膦, 含硅合金, 铁合金

In acidic solution, a stable purple complex of strontium was formed with a new photometric reagent, 2-(4'-chloro-2'-phosphonazo)-7-(2',6'-dibromo-4'-chlorophenylazo)-1,8-di hydroxy-3,6-naphthalenedisulfonic acid (DBC-CPA). This complex exhibits absorption max. at 630 nm with apparent molar absorptivity of 6.3 ?104 L mol-1 cm-1. The Sr/DBC-CPA ratio of this complex is 1:2. In the presence of acetone, Na2SO4, and EDTA and with the absorbance determine by the dual-wavelength, there is no interference by the presence of large amts. of barium, calcium, iron, magnesium, and a no. of other ions. A method has been developed for the determination of strontium in seawater, magnesium oxide, and silicon-iron alloy with satisfactory results.

Key words: SPECTROPHOTOMETRY, ORGANO BROMINE COMPOUNDS, STRONTIUM, SEA WATER, COLOR REACTION, ORGANO CHLORIDE COMPOUNDS, MAGNESIUM OXIDE, CHLOROPHOSPHONAZO, SILICON CONTAINING ALLOYS, IRON ALLOYS

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