The metabolites and metabolic passways of nitrazepam in rat were confirmed.Wistar rats were feed a pill of nitrazepam,24 h urine reactions were collected.After β-Glucuronidase hydrolysis of the urine samples,the frac...The metabolites and metabolic passways of nitrazepam in rat were confirmed.Wistar rats were feed a pill of nitrazepam,24 h urine reactions were collected.After β-Glucuronidase hydrolysis of the urine samples,the fractions were extracted by Oasis HLB3cc solid-phase column and analyzed by gas chromatography-mass spectrometry with DB-35 MS column.7-Acetylaminonitrazepam,7-aminonitrazepam and 2-amino-5-nitrophenylphenylmethanone were identified as nitrazepam metabolites.The results suggested that two metabolic passways for nitrazepam may be operative in rat.The first passway leads to the corresponding 7-aminonimetazepam in which the amino group is subsequently acetylated.The second passway is open the parent compounds rings to 2-amino-5-nitrophenylphenylmethanone.Nitrazepam was metabolized quickly in rats and 7-acetylaminonitrazepam were the main metabolites in urine.展开更多
采用顶空固相微萃取结合气质联用(headspace-solid phase microextraction coupled with gas chromatography-mass spectrometry,SPME-GC/MS)技术,对常温贮存下羊奶粉中挥发性成分进行提取与分析。在常温贮存1年的羊奶粉中,共检出41种...采用顶空固相微萃取结合气质联用(headspace-solid phase microextraction coupled with gas chromatography-mass spectrometry,SPME-GC/MS)技术,对常温贮存下羊奶粉中挥发性成分进行提取与分析。在常温贮存1年的羊奶粉中,共检出41种挥发性成分。其中酸类成分最多,共13种,其次是酯类、烃类、醇类和醛酮类,分别为6、4、4和3种。羊奶粉的主体挥发性成分组成是丁酸、己酸、庚酸、辛酸、4-甲基辛酸、癸酸、月桂酸、邻苯二甲酸二甲酯、辛酸乙酯、十五烷、苯甲醛、甘菊环、己内酰胺,己酸、辛酸、4-甲基辛酸和癸酸在贮存6个月之后含量有明显增加趋势。在整个贮存期间,对羊奶粉膻味有较大影响的酸类物质有己酸、辛酸、4-甲基辛酸和癸酸,尤其是4-甲基辛酸,由于其较低阈值,成为最主要的羊膳物质,并且随着贮存时间的增加,酸类、酯类含量逐渐增加。展开更多
文摘The metabolites and metabolic passways of nitrazepam in rat were confirmed.Wistar rats were feed a pill of nitrazepam,24 h urine reactions were collected.After β-Glucuronidase hydrolysis of the urine samples,the fractions were extracted by Oasis HLB3cc solid-phase column and analyzed by gas chromatography-mass spectrometry with DB-35 MS column.7-Acetylaminonitrazepam,7-aminonitrazepam and 2-amino-5-nitrophenylphenylmethanone were identified as nitrazepam metabolites.The results suggested that two metabolic passways for nitrazepam may be operative in rat.The first passway leads to the corresponding 7-aminonimetazepam in which the amino group is subsequently acetylated.The second passway is open the parent compounds rings to 2-amino-5-nitrophenylphenylmethanone.Nitrazepam was metabolized quickly in rats and 7-acetylaminonitrazepam were the main metabolites in urine.
文摘采用顶空固相微萃取结合气质联用(headspace-solid phase microextraction coupled with gas chromatography-mass spectrometry,SPME-GC/MS)技术,对常温贮存下羊奶粉中挥发性成分进行提取与分析。在常温贮存1年的羊奶粉中,共检出41种挥发性成分。其中酸类成分最多,共13种,其次是酯类、烃类、醇类和醛酮类,分别为6、4、4和3种。羊奶粉的主体挥发性成分组成是丁酸、己酸、庚酸、辛酸、4-甲基辛酸、癸酸、月桂酸、邻苯二甲酸二甲酯、辛酸乙酯、十五烷、苯甲醛、甘菊环、己内酰胺,己酸、辛酸、4-甲基辛酸和癸酸在贮存6个月之后含量有明显增加趋势。在整个贮存期间,对羊奶粉膻味有较大影响的酸类物质有己酸、辛酸、4-甲基辛酸和癸酸,尤其是4-甲基辛酸,由于其较低阈值,成为最主要的羊膳物质,并且随着贮存时间的增加,酸类、酯类含量逐渐增加。
