The disodium ferrate is very unstable,but its decomposition can be constrained by a strong oxidative agent,sodium hypochlorite.The concentration of disodium ferrate was determined by spectrophotometry directly with pH...The disodium ferrate is very unstable,but its decomposition can be constrained by a strong oxidative agent,sodium hypochlorite.The concentration of disodium ferrate was determined by spectrophotometry directly with pH=12~14 and one percent sodium hypochlorite as a solvent.The accuracy and precision of this method was also discussed in this article.展开更多
文摘近年来,烟蓟马呈加重发生的趋势,已成为我国葱蒜类蔬菜上的重要害虫之一。了解烟蓟马不同虫态的形态特征、为害特点和发生规律,采取合理的防治措施是控制该害虫发生的关键。烟蓟马(Thrips tabaci Lindeman)又名葱蓟马、棉蓟马,属缨翅目(Thysanoptera)蓟马科(Thripidae)蓟马属(Thrips),属于世界性害虫(Muvea et al.,2014),广泛分布于亚洲、欧洲、非洲、北美洲、南美洲等各大洲,在我国绝大多数省份均发现其危害(韩运发,1997)。
文摘The disodium ferrate is very unstable,but its decomposition can be constrained by a strong oxidative agent,sodium hypochlorite.The concentration of disodium ferrate was determined by spectrophotometry directly with pH=12~14 and one percent sodium hypochlorite as a solvent.The accuracy and precision of this method was also discussed in this article.