Chemical, Aroma and Pro-Health Characteristics of Kaffir Lime Juice-The Approach Using Optimized HS-SPME-GC-TOFMS, MP-OES, 3D-FL and Physiochemical Analysis

The study aimed to provide the chemical, aroma and prohealth characteristics of the kaffir lime juice. A procedure using solid-phase microextraction with gas chromatography (SPME-GC-TOFMS) was optimized and validated for the determination of terpenes of kaffir lime. Main physicochemical parameters: pH, vitamin C, citric acid and & DEG;Brix were evaluated. Micro- and macro elements were determined using microwave plasma optic emission spectrometry (MP-OES). The binding of kaffir lime terpenes to human serum albumin (HSA) was investigated by fluorescence spectroscopy (3D-FL). & beta;-Pinene and Limonene were selected as the most abundant terpenes with the concentration of 1225 & PLUSMN; 35 and 545 & PLUSMN; 16 & mu;g/g, respectively. The values of citric acid, vitamin C, & DEG;Brix and pH were 74.74 & PLUSMN; 0.50 g/kg, 22.31 & PLUSMN; 0.53 mg/100 mL, 10.35 & PLUSMN; 0.70 and 2.406 & PLUSMN; 0.086 for, respectively. Iron, with a concentration of 16.578 & PLUSMN; 0.029 mg/kg, was the most abundant microelement. Among the macroelements, potassium (8121 & PLUSMN; 52 mg/kg) was dominant. Kaffir lime binding to HSA was higher than & beta;-Pinene, which may indicate the therapeutic effect of the juice. Kaffir lime juice is a source of terpenes with good aromatic and bioactive properties. Fluorescence measurements confirmed its therapeutic effect. Kaffir lime juice is also a good source of citric acid with potential industrial application. The high content of minerals compared to other citruses increases its prohealth value.