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The ripe seeds of the betel palm (Palmae) plant betel nut (Areca catechu Linn.), Is the world's fourth second only to tobacco, alcohol and caffeine hobby products, has been widely used in our country as a commonly used Chinese medicine is widely used in clinical medicine, Hunan and other areas, the processed goods betel very popular. Therefore, in-depth research and analysis of the chemical composition of the betel nut has a very important significance. In this experiment, Hainan betel nut, Taiwan, betel nut, Vietnam betel fruit as raw material, the determination of moisture, ash. Three kinds of betel nut at 45 ℃ drying, take the peel, stone sifted through a 60 mesh sieve, Determination of three kinds of betel nut arecoline, fatty acids, amino acids, inorganic elements, the main results are as follows: determined by single factor and orthogonal experiments ether ultrasonic extraction of arecoline optimum extraction conditions: extraction time of 30 min, the power of 80 w, solid-liquid ratio (w / v) 1:12. Ether ether ultrasonic extraction and heat extraction were compared, results showed: ultrasonic extraction than solvent extraction. By GC-MS analysis of arecoline in betel nut, retention time, Mass Spectrometry, external standard method. GC-MS determination the arecoline relative standard deviation of 2.56%, the recoveries of 98.6-102.6%. GC-MS determination of the alkali content of three kinds of betel nut betel nut pericarp and seed compare measured results with the volumetric method. The results showed that the GC-MS measured the the betel nut alkali content of 0.12 to 0.38%, the measured volumetric method betel alkali content is content from 0.32 to 0.56%. The arecoline measured by volumetric method also includes other alkaloids in betel nut. High and low alkali content of betel nut samples measured by the two methods are: Vietnamese betel nut or nut gt; Hainan betel nut or nut gt; Taiwan betel nuts or nut gt; Taiwan betel peel gt; areca peel gt in Vietnam; Hainan betel peel. GC-MS determination of fatty acid composition and the relative content of the three kinds of betel nut pericarp and seed, and principal component analysis, a comprehensive evaluation of the three kinds of betel nut pericarp and seed fatty acid. The results showed that: the betel containing caprylic acid, capric acid, lauric acid, myristic acid, palmitoleic acid, palmitic acid, heptadecanoic acid, linoleic acid, linolenic acid, oleic acid, stearic acid. Palmitic acid content 27.70-42.28%, linoleic 29.3 to 33.80%, 10.15-29.50% of the oleic acid content of the unsaturated fatty acid of the total fatty acid content of 51.74 to 66.84%. The betel characterized fatty acid is palmitic acid, oleic acid, linoleic acid, stearic acid, caprylic acid, capric acid, lauric acid. The comprehensive evaluation of the level of the three kinds of betel nut pericarp and seed fatty acids: Taiwan's betel nut or nut gt; Taiwan betel nut peel gt; Hainan betel peel gt; Vietnamese betel peel gt; the Vietnam the betel stone gt; Hainan betel stones. OPA column derivatization high-performance liquid chromatographic determination of ammonia and amino acid analysis of three kinds of betel nut. The results show that: betel contains 14 kinds of amino acids, essential amino acids, wherein glutamic acid, valine, leucine, histidine, phenylalanine content is higher. Hainan betel nut, Taiwan betel nut, betel amino acid content of Vietnam were 5.41%, 6.06%, 5.49%. Determine and compare the three kinds of betel nut pericarp and seed in several nutrients. The results show that: three kinds of areca peel and stone in the quality of the protein and reducing sugar scores were not significantly different; stone and peel crude fat mass fraction of all reach significant difference. Determination of inorganic elements in three kinds of betel nut, the results showed that: three kinds of betel nut contains a variety of essential trace elements Fe, Cu, Mn, Zn and constant mineral elements K, Ca, Mg.
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