A micro-oxygen-boinb calorimeter with a bomb of 4.8 cm3 internal volume was constructed in our laboratory. About 10 mg of sample was needed for each combustion experiment.The energy equivalent of this calorimeter was ...A micro-oxygen-boinb calorimeter with a bomb of 4.8 cm3 internal volume was constructed in our laboratory. About 10 mg of sample was needed for each combustion experiment.The energy equivalent of this calorimeter was determmed with electric energy. The standard diviation of mean from 5 measurements was 0.02 %.The enthalpies of combustion of pure C60 and C70 were determined, kJ. mol-1,kJ·mol. The enthalpies of formation of the two compounds were derived. Using the Laidlertype bond parameters for aromatic hydrocarbons, the estimated strain energies in C60 and C70 molecules were close each other and close to the estimated value from the model compound, corannulene.展开更多
采用氧弹燃烧法对试样进行燃烧,然后用水作为吸收液进行吸收,提出了离子色谱法分离测定电子产品中卤素含量的方法。以Metrosep A Supp 4型阴离子分析柱为离子交换柱,以1.8mmol·L^(-1)碳酸钠-1.7mmol·L^(-1)碳酸氢钠溶液为淋...采用氧弹燃烧法对试样进行燃烧,然后用水作为吸收液进行吸收,提出了离子色谱法分离测定电子产品中卤素含量的方法。以Metrosep A Supp 4型阴离子分析柱为离子交换柱,以1.8mmol·L^(-1)碳酸钠-1.7mmol·L^(-1)碳酸氢钠溶液为淋洗液等度洗脱。3种卤素离子氟离子、氯离子和溴离子的方法检出限(3S/N)依次为4.0,5.6,20.5μg·L^(-1)。该方法已用于电子产品中卤素的测定。展开更多
文摘A micro-oxygen-boinb calorimeter with a bomb of 4.8 cm3 internal volume was constructed in our laboratory. About 10 mg of sample was needed for each combustion experiment.The energy equivalent of this calorimeter was determmed with electric energy. The standard diviation of mean from 5 measurements was 0.02 %.The enthalpies of combustion of pure C60 and C70 were determined, kJ. mol-1,kJ·mol. The enthalpies of formation of the two compounds were derived. Using the Laidlertype bond parameters for aromatic hydrocarbons, the estimated strain energies in C60 and C70 molecules were close each other and close to the estimated value from the model compound, corannulene.
文摘采用氧弹燃烧法对试样进行燃烧,然后用水作为吸收液进行吸收,提出了离子色谱法分离测定电子产品中卤素含量的方法。以Metrosep A Supp 4型阴离子分析柱为离子交换柱,以1.8mmol·L^(-1)碳酸钠-1.7mmol·L^(-1)碳酸氢钠溶液为淋洗液等度洗脱。3种卤素离子氟离子、氯离子和溴离子的方法检出限(3S/N)依次为4.0,5.6,20.5μg·L^(-1)。该方法已用于电子产品中卤素的测定。
