Background: The theory of partial order is a branch of Discrete Mathematics and is often seen as pretty esoteric. However, depending on a suitable definition of an order relation, partial order theory has some statistical flavor. Here we introduce the application of partial order for environmental chemistry.

Objective: We showed that partial order is an instrument, which at the same time, has both data exploration - and evaluation potency.

Methods: The partial order theory was applied in this study. It depends on four indicators which describe the environmental hazards of chemicals.

Results: Nineteen organic chemicals were found within a monitoring study in the German river Main and were taken as an exemplary case. The results indicated that chemicals can have a high risk on the environment, however, the type of risk is different and should not conceptually merge into a single quantity.

Conclusion: Partial order theory is of help to define different regulations and environmental management plans.

背景：偏序理论是离散数学的一个分支，通常被认为是深奥的。但是，根据适当的顺序关系定义，偏序理论具有一定的统计意义。在这里，我们介绍了偏序在环境化学中的应用。

目的：我们证明偏序是一种工具，同时具有数据探索和评估能力。

方法：采用偏序理论。它取决于描述化学物质环境危害的四个指标。

结果：在德国美因河的一项监测研究中发现了19种有机化学物质，这些有机化学物质被列为示例。结果表明，化学品对环境可能具有很高的风险，但是，风险的类型不同，因此从概念上讲不应合并为单一数量。

结论：偏序理论有助于定义不同的法规和环境管理计划。