Choudhury R Paul, Kumar A, Garg A N
Department of Chemistry, Indian Institute of Technology, Roorkee 247667, India.
J Pharm Biomed Anal. 2006 Jun 7;41(3):825-32. doi: 10.1016/j.jpba.2006.01.048. Epub 2006 Feb 28.
Mint, belonging to the genus Mentha in the family Labiatae (Lamiaceae) is pungent in taste with post digestive effects and hot potency. Ten samples of mint leaves, collected from four different locations in North-West parts of India (Roorkee, Dehradun, Baghpat and Uttarkashi) were analysed for seven minor (Al, Na, K, Ca, Cl, Mg, and P) and 20 trace (As, Au, Ba, Br, Co, Cr, Cs, Eu, Fe, Hf, Hg, La, Mn, Rb, Sb, Sc, Se, Sn, Th and Zn) elements by instrumental neutron activation analysis (INAA). Also Ni, Cu and Cd were determined by atomic absorption spectrophotometry (AAS). Samples along with reference materials (RMs) and synthetic primary standard were irradiated at approximately 10(13) n cm-2s-1 and its gamma-activity was measured using HPGe detector and MCA system. Most elements were found in widely varying amounts depending on the location, e.g. Na (0.21-0.86 mg/g), K (12.4-53.3 mg/g) and Ca (5.82-16.8 mg/g) whereas mean contents of other nutrient elements in mint were: Fe (108+/-22 microg/g), Mg (4.83+/-0.92 mg/g), Mn (53.5+/-9.6 microg/g), P (3.88+/-0.94 mg/g), Cu (16.9+/-1.8 microg/g), Zn (21.0+/-4.7 microg/g) and Se (0.18+/-0.03 microg/g). Further, DPPH free radical scavenging activity test in diethyl ether extract showed 100% activity at approximately 40 microg/L suggesting it to be antioxidant in accordance with literature reports.
薄荷属于唇形科（拉米亚科）薄荷属，味道辛辣，有消化后效应且性热。从印度西北部四个不同地点（鲁尔基、德拉敦、巴格帕特和北阿坎德邦）采集了十个薄荷叶样本，通过仪器中子活化分析（INAA）对七种微量元素（铝、钠、钾、钙、氯、镁和磷）和二十种痕量元素（砷、金、钡、溴、钴、铬、铯、铕、铁、铪、汞、镧、锰、铷、锑、钪、硒、锡、钍和锌）进行了分析。此外，通过原子吸收分光光度法（AAS）测定了镍、铜和镉。样本与参考物质（RMs）和合成初级标准一起以约10(13) n cm-2s-1的剂量进行辐照，并使用高纯锗探测器和多道分析系统测量其伽马活性。发现大多数元素的含量因地点而异，例如钠（0.21 - 0.86毫克/克）、钾（12.4 - 53.3毫克/克）和钙（5.82 - 16.8毫克/克），而薄荷中其他营养元素的平均含量为：铁（108±22微克/克）、镁（4.83±0.92毫克/克）、锰（53.5±9.6微克/克）、磷（3.88±0.94毫克/克）、铜（16.9±1.8微克/克）、锌（21.0±4.7微克/克）和硒（0.18±0.03微克/克）。此外，二乙醚提取物中的DPPH自由基清除活性测试表明，在约40微克/升时活性为100%，根据文献报道表明其具有抗氧化性。
