本文建立了高效液相色谱法同时测定复合膜袋中苯代三聚氰胺、2,4-二羟基二苯甲酮和2-羟基-4-甲氧基二苯甲酮残留量的方法。试样剪成小于2 mm的碎片,经甲醇超声提取,氮气浓缩至干,再用2 m L流动相超声溶解,经0.45μm滤膜过滤后,采用液相...本文建立了高效液相色谱法同时测定复合膜袋中苯代三聚氰胺、2,4-二羟基二苯甲酮和2-羟基-4-甲氧基二苯甲酮残留量的方法。试样剪成小于2 mm的碎片,经甲醇超声提取,氮气浓缩至干,再用2 m L流动相超声溶解,经0.45μm滤膜过滤后,采用液相色谱(配PDA检测器)进行检测,外标法定量。研究表明:在0.05~10.0 mg/L的范围内,各标准物质线性关系良好,相关系数(r)均大于0.9995,方法检出限低,回收率在88.60%~112.32%,相对标准偏差(RSD)在0.09%~3.05%之间,方法精密度较好。该方法简便快捷,结果准确可靠,时效性高。展开更多
AIM:To examine the effects of 2,4-dihydroxybenzophenone(BP-1),a benzophenone derivative used as an ultraviolet light absorbent,on acetaminophen(APAP)induced hepatotoxicity in C57BL/6J mice.METHODS:Mice were administer...AIM:To examine the effects of 2,4-dihydroxybenzophenone(BP-1),a benzophenone derivative used as an ultraviolet light absorbent,on acetaminophen(APAP)induced hepatotoxicity in C57BL/6J mice.METHODS:Mice were administered orally with BP-1 at doses of 200,400 and 800 mg/kg body weight respectively every morning for 4 d before a hepatotoxic dose of APAP(350 mg/kg body weight) was given subcutaneously.Twenty four hours after APAP intoxication,the serum enzyme including serum alaine aminotransferase(ALT),aspartate aminotransferase(AST),lactate dehydrogenase(LDH) were measured and liver histopathologic changes were examined.RESULTS:BP-1 administration dramatically reduced serum ALT,AST and LDH levels.Liver histopathological examination showed that BP-1 administration antagonized APAP-induced liver pathological damage in a dose-dependent manner.Further tests showed that APAP-induced hepatic lipid peroxidation was reduced significantly by BP-1 pretreatment,and glutathione depletion was ameliorated obviously.CONCLUSION:BP-1 can effectively protect C57BL/6J mice from APAP-induced hepatotoxicity,and reduction of oxidative stress might be part of the protection mechanism.展开更多
文摘本文建立了高效液相色谱法同时测定复合膜袋中苯代三聚氰胺、2,4-二羟基二苯甲酮和2-羟基-4-甲氧基二苯甲酮残留量的方法。试样剪成小于2 mm的碎片,经甲醇超声提取,氮气浓缩至干,再用2 m L流动相超声溶解,经0.45μm滤膜过滤后,采用液相色谱(配PDA检测器)进行检测,外标法定量。研究表明:在0.05~10.0 mg/L的范围内,各标准物质线性关系良好,相关系数(r)均大于0.9995,方法检出限低,回收率在88.60%~112.32%,相对标准偏差(RSD)在0.09%~3.05%之间,方法精密度较好。该方法简便快捷,结果准确可靠,时效性高。
基金Supported by Drug Innovation Program of National Science and Technology Project, No. 2009ZX09103-007
文摘AIM:To examine the effects of 2,4-dihydroxybenzophenone(BP-1),a benzophenone derivative used as an ultraviolet light absorbent,on acetaminophen(APAP)induced hepatotoxicity in C57BL/6J mice.METHODS:Mice were administered orally with BP-1 at doses of 200,400 and 800 mg/kg body weight respectively every morning for 4 d before a hepatotoxic dose of APAP(350 mg/kg body weight) was given subcutaneously.Twenty four hours after APAP intoxication,the serum enzyme including serum alaine aminotransferase(ALT),aspartate aminotransferase(AST),lactate dehydrogenase(LDH) were measured and liver histopathologic changes were examined.RESULTS:BP-1 administration dramatically reduced serum ALT,AST and LDH levels.Liver histopathological examination showed that BP-1 administration antagonized APAP-induced liver pathological damage in a dose-dependent manner.Further tests showed that APAP-induced hepatic lipid peroxidation was reduced significantly by BP-1 pretreatment,and glutathione depletion was ameliorated obviously.CONCLUSION:BP-1 can effectively protect C57BL/6J mice from APAP-induced hepatotoxicity,and reduction of oxidative stress might be part of the protection mechanism.
