We report a rare case of duodenal perforation caused by an ingested 12-cm long toothbrush handle. A 22-year-old female p......

建立了牙刷刷毛中16种邻苯二甲酸酯的气相色谱-质谱（Gc—Ms）检测方法。样品经超声提取后，采用外标法选择离子扫描模式（SIM）进行定量分析......