Phosphate is a well-known contaminant and its content is an indicator of water quality, so it is important to have an efficient monitoring of the soil leaching process.

In this work, an automatic, low cost flow analysis method, capable of real-time monitoring of the soil leaching processes using spectrophotometric detection, based on the molybdenum blue reaction, was developed. The developed methodology for phosphate determination was based on the molybdenum blue reaction and includes an on-line solid phase extraction (SPE) step, involving an AG1-X8 anionic exchange sorbent.

The described SI method enabled phosphate determination within a wide range, 1–80 µM, with a detection limit of 0.52 µM. It was successfully applied to leachates from laboratory scale soil columns (LSSC) and one sample analysis was carried out in triplicate, in less than 10 minutes.

磷酸盐是一种众所周知的污染物，其含量是水质的指标，因此对土壤浸出过程进行有效监控非常重要。

在这项工作中，基于钼蓝反应，开发了一种自动，低成本的流量分析方法，该方法能够使用分光光度检测法实时监测土壤浸出过程。磷酸盐测定的开发方法基于钼蓝反应，包括在线固相萃取（SPE）步骤，其中涉及AG1-X8阴离子交换吸附剂。

所描述的SI方法可在1-80 µM的宽范围内进行磷酸盐测定，检测限为0.52 µM。它已成功应用于实验室规模的土壤柱（LSSC）的渗滤液，并在10分钟内进行了三次重复的一次样品分析。