Determination of Longkong (Lansium domesticum Corr.) by Microwave Sensor Technique

Abstract

The purpose of this research is to determine the suitable harvest index for harvesting Longkong bunches for export to overseas or distant markets. The technique for analyzing concentration of microwave through Longkong fruit with microwave optics was used. The results from the microwave concentration analysis were compared with the ratio of total soluble solids to acid content (TSS: TA) of Longkong fruit ages of 85-120 days after anthesis. The results showed that the concentration of microwave was in the range of 0.75-0.58 mA, which the Longkong fruit have the ages of 91-103 days after anthesis and TSS: TA was between 6.13-9.86. The Longkong fruit has yellow skin, firmly attached to Longkong bunch, and a sweet taste, suitable for export to distant markets or overseas. For the concentration of microwave in the range of 0.58-0.41 mA, the TSS: TA was in the range of 9.86-13.55, in which the Longkong fruit was 103-115 days after anthesis, the Longkong fruits are very sweet, and the skin is dark yellow, tasty. It was suitable for selling near the orchardt.