Nitrogen Determination in Leaves Palm Oil using The San++ Scalar Continuous Flow Analyzer Following Wet Digestion with 50ml Dilution Sulfuric Acid: Testing and Validation

Abstract

Nitrogen is a crucial macronutrient for the growth of oil palm plants. Insufficient nitrogen can lead to chlorosis in young leaves, causing them to turn yellow and impede growth. To determine the nitrogen content in oil palm leaves and estimate the required fertilizer amount, a test must be conducted. In this study, the Association of Analytical Communities (AOAC) standard method was employed to measure nitrogen levels. The method's performance procedure has undergone changes. The test results displayed a high correlation coefficient (r) of 99.99% and a % relative standard deviation (RSD) value of 1.8541%. The RSD value is below 2/3 of Horwitz CV, which is 7.7565. The single test accuracy was determined to be 102.01%, while the spike variation accuracy test yielded 102.66%. The limit of detection (LOD) was found to be 8.9213, and the limit of quantitation (LOQ) was determined as 29.7378. Furthermore, the instrument's limit values were established as an LOD of 8.8575 and an LOQ of 29.5250. The test results obtained meet the acceptance criteria based on AOAC.