The study of comparing analysis methods on the nitrogen and other elements of leaves nutrition

• Main Authors: Shu-Yen Teng, 鄧淑燕
• Other Authors: Shiuan-Yuh Chien
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/61990251769579615390

碩士 === 朝陽科技大學 === 應用化學系碩士班 === 98 === The most important and most nutritious elements on the leaves are three elements : Nitrogen(N),Phosphorus(P) and Potassium(K). In this study, try to study and evaluate the analysis method of the principal component, nitrogen, on the leaves only. To use the samples of the four different components on the leaves to compare three different methods of implant samples with nitrogen and to determine the applicability of nitrogen. In addition to determination of nitrogen content, the pre-treatment of dilution can be measured the other content of the essential nutrients by ICP. This process try to investigate (1) Sulfuric acid digestion (add Hydrogen peroxide); (2) digestion of Kjeldahl digestion (add catalyst) to Automatic Analyzer (colorimetric analysis) analysis of leaf nitrogen content. To compare(1)sulfuric acid digestion (2) Kjeldahl digestion contained Phosphorus(P)、Potassium(K) 、Calcium(Ca)、Magnesium(Mg)、Iron(Fe)、Manganese(Mn)、Copper(Cu)、and Zinc (Zn)． On the other hand, to use the (3)Elemental Analyzer sample to determine the nitrogen content on the implant sample. On the process of the experiment, there are three different ways. The nitrogen content of the measured value and standard components are close to. To continuously analyze(1) Sulfuric acid digestion, (2) Kjeldahl digestion by Automatic Analyzer (colorimetric analysis), the pre-treatments of the leaf consist the nitrogen contents are over five hundred of samples. However, the (2) method of Kjeldahl digestion was interfered by the catalyst, it can not be accurately measured the levels of the other essential elements on the leaf, especially the Potassium, one of the three required elements. And, it only got the C, H, N, O by the (3) Elemental Analyzer. Although the precise scale of the samples was little, the pre-treatment sample on the leaf can not be too rough, they must be evenly mixed. To compare the three different methods of analysis, the (1) method, Sulfuric acid digestion (add Hydrogen peroxide) for the optimized, is the best way to be used in a large number of sampling and analysis on the field.