精品文献
气相质谱联用仪价格
气相色谱-质谱联用法测定塑料产品中的溴系阻燃剂
气相色谱-质谱联用法测定塑料产品中的溴系阻燃剂
Brominated flame-retardant,such as deca-BDE,TBBP-A,TBBP-A-bis is one kind of the additives of plastic product for flame retardation.European has published a direction to restrict the used amount of brominated flame-retardant,because of their toxicity.The present work reports a GC-MS method for the determination of the brominated retardants.The method meets the requirements of the direction 2002/95/EC,and has been applied to the real sample analysis.
海南龙血树茎及其血竭脂溶性成分的气相色谱-质谱联用分析
海南龙血树茎及其血竭脂溶性成分的气相色谱-质谱联用分析
目的分析海南龙血树茎及其血竭脂溶性成分。方法采用溶剂萃取法提取海南龙血树茎及其血竭脂溶性成分,用GC-MS联用技术鉴定其化学成分。结果从海南龙血树茎及其血竭脂溶性成分中分别鉴定出21和33种成分,海南龙血树茎脂溶性成分主要有邻苯二甲酸二异辛酯(10.33%)和环木菠萝烷醇(8.51%);其血竭脂溶性成分主要有薯蓣皂苷元(10.62%)和7-羟基-4'-甲氧基黄烷(9.88%),其中8个化合物为共有成分。结论海南龙血树茎及其血竭脂溶性成分的组成和含量存在着差异,在入药和研究中都应区别对待。