方案摘要
方案下载| 应用领域 | 农/林/牧/渔 |
| 检测样本 | 饲料 |
| 检测项目 | 理化分析>酚酸和有机酸 |
| 参考标准 | 无 |
为了在农业中提供适当的青贮饲料或干草饲料，必须定期监测其中某些有机酸的形成。例如，丁酸的形成预示了饲料的变质。有时候饲料从业者人为添加甲酸或丙酸，以提高饲料的营养品质。同样的饲料和一些其他可生物降解的废物（农业残留物，污水污泥等）也可用于沼气厂，其中发酵过程可以通过确定某些有机酸来进行监测。 本方法允许测定饲料添加剂、青贮料、牧草和不同生物可降解材料中的一些重要有机酸如乙酸、乳酸、丁酸、丙酸和甲酸。在该方法中还可以确定一些其它有机酸（草酸、富马酸等）。
To provide the proper conditions for silage or haylage storage in agriculture it is necessary to regularly monitor the formation of certain organic acids in it. For example, the formation of butyric acid can indicate spoiling of material. Formic or propionic acids can be artificially added to increase the nutritional quality.
The same materials and some other biodegradable waists (agricultural residues, sewage sludge, etc.) are also used in biogas plants, where the fermentation process must be carefully monitored, in particular, by the determining the certain organic acids.
The present method allows determination of some important organic acids like acetic, lactic, butyric, propionic, and formic in feedstuff additives, silage, haylage and in different biodegradable materials of biogas plants. Some other organic acids (oxalic, fumaric, etc.) can be also determined within this method.
The capillary electrophoresis method for the determination of organic acids is based on their differential migration and separation in a fused silica capillary under the influence of electric field. Sample pretreatment includes either just water extraction or sample distillation with steam. CE separation is completed within 5 minutes.
Identification and quantification of the analyzed organic acids is performed by measuring their intrinsic UV absorption at 190 nm.
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