김 양식 산처리제용 유기산의 특성 (Ⅰ)

The characteristics of organic acids as acid treatment for the cultivating porphyra (Ⅰ)

To investigate the possibility as an organic acid treatment in the cultivating Porphyra, 21 species of organic acid were examined for the chemical characteristics, pH, the effect of concentration, dilution, salinity and mixed organic acid. L-, D-, DL-Aspartic acid and Fumaric acid were not soluble in water. 0.1M Oxalic acid has pH=1.55, this value is the lowest pH in the examined organic acids. Salt effect was observed in the same concentration of organic acid, that is, pH of solution was decreased with increasing the salinity of solvent. The linear relationship between pKa1 and pH was positive and correlation coefficient was r=0.9738. The synergic effect was not observed in the mixture of citric acid and oxalic acid. pH variation was simple with the relative amount of each component in mixed organic acid.