• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International journal of environmental analytical chemistry >MONITORING OF ORTHO-PHOSPHATES IN WASTEWATERS BASED ON THE OXIDIZING EFFECT OF MOLYBDENUM ON DIPHENYLAMINE IN A FORMIC ACID SOLUTION ENVIRONMENT
【24h】

MONITORING OF ORTHO-PHOSPHATES IN WASTEWATERS BASED ON THE OXIDIZING EFFECT OF MOLYBDENUM ON DIPHENYLAMINE IN A FORMIC ACID SOLUTION ENVIRONMENT

机译：基于钼对甲酸溶液环境中钼对二苯胺的氧化作用监测废水中的邻苯二甲酸

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A new approach towards the spectrophotometric determination of ortho-phosphates is described. The method is based on the reaction of phosphate with the by-products of the oxidation reaction between diphenylamine and molybdenum (VI) in a formic acid solution environment. The final product absorbs at 340 nm allowing for the determination of ortho-phosphates at concentrations as low as 0.44 mg L~(-1) by using a very small sample volume. The calibration curve is linear in the range of 0.5-3 mg L~(-1) yielding recoveries higher than 96% in various sample matrices. Under the optimum experimental conditions side reactions with other ions that usually have high affinity for molybdenum ions are absent or minimum allowing for the interference free determination of PO_4~(3-). The only interference rises from the partial decomposition of organic or acid-hydrolysable phosphorus, which is codetermined with ortho-phosphates as a result of the extreme acidic conditions. However, their effects are minor compared to the interferences usually observed with the traditional methods.
机译：描述了一种用于分光光度法测定正磷酸盐的新方法。该方法基于磷酸盐与甲酸溶液环境中二苯胺和钼（VI）之间的氧化反应副产物的反应。最终产物在340 nm处吸收，可通过使用非常小的样品量来测定低至0.44 mg L〜（-1）的正磷酸盐。校准曲线在0.5-3 mg L〜（-1）范围内是线性的，在各种样品基质中的回收率均高于96％。在最佳实验条件下，与其他通常对钼离子具有高亲和力的离子的副反应不存在或极少，因此可以无干扰地测定PO_4〜（3-）。唯一的干扰来自有机或酸可水解磷的部分分解，这是由于极端酸性条件与正磷酸盐共同决定的。但是，与传统方法通常观察到的干扰相比，它们的影响较小。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号