Penentuan Pola Respirasi Buah Rampai Menggunakan Larutan Ca(OH)2 dan NaOH Determining The Respiration Pattern of Potpuccino Using Ca(OH)2 and NaOH Solution

Abstract

Potpourri fruit has the property of being easily damaged or perishable. Respiration is an indicator of product deterioration and a crucial indicator in the development of storage technology. The aim of this determination research is to measure the respiration rate of potpourri fruit and determine the respiration pattern of potpourri fruit. Observation of fruit respiration rate at room temperature was measured based on the amount of CO2 gas produced every day for five days, by titrimetry. The method of measurement is as follows: air before passing through the fruit sample, is first passed in a solution of Ca(OH)2 in Erlenmeyer A to bind any remaining CO2 that may still be there, the air that comes out of Erlenmeyer A is put into a container containing potpourri. Furthermore, the air that comes out of the container containing rampai is collected in Erlenmeyer B which contains 50 ml of 0.05 N NaOH which functions to bind CO2 which is produced by the fruit as a result of respiration. (To bind CO2 which may not have been bound after passing through Erlenmeyer B, another Erlenmeyer C can be used which also contains 0.05 N NaOH solution. This step is optional or may be omitted if we are sure that the CO2 is all bound with NaOH in Erlemyer B). Potpourri fruit is subjected to an observation process (marked by a change in color to yellow). The results of the study adding HCL solution at a concentration of 0.05 N NaOH showed results of 10.2 mL, 25.4 mL, 45 mL, 46.9 mL, and 48.5 mL and the addition of HCL solution at a concentration of 0.01 N NaOH showed results of 18.5 mL, 8.1 mL, 2 mL, 2 mL, and 1 mL. From the results of determining the respiration pattern of potpourri at 0.05 N NaOH, the graphical results showed a decrease, while at 0.01 N NaOH concentration, the graphical results showed an increase. At a concentration of 0.05 N NaOH, the longer the respiration time, the more HCL solution needed in the titration process, while at a concentration of 0.01 N NaOH, the less.

Keywords: potpourri, respiration