Journal of Materials Research
The morphology of the dark and bright regions observed by transmission electron microscopy for the Zr(64.13)Cu(15.75)Ni(10.12)Al(10) bulk metallic glass strongly depends on the ion beam parameters used for ion milling. This indicates that the ion beam could introduce surface fluctuation to metallic glasses during ion milling.
关键词:
room-temperature
江虹
,
胡小莉
,
刘绍璞
,
秦宗会
,
湛海粼
应用化学
doi:10.3969/j.issn.1000-0518.2003.09.016
在pH值为3.5~6.0,镧(Ⅲ)-依文思蓝(EB)与硫酸新霉素(NEO)、硫酸卡那霉素(KANA)、硫酸庆大霉(GEN)和硫酸妥布霉素(TOB)等氨基糖苷类抗生素反应可生成具有吸收峰和负吸收峰的三元蓝色离子缔合物.其最大吸收波长位于668~674 nm,线性范围从0~1.20×10-5g/mL至0~1.加×10-5g/mL,摩尔吸收光系数(ε)在3.10×104~6.17×104L/(mol@cm)之间;最大负吸收波长位于614~620 nm,线性范围从0~9.00×10-6g/mL至0~1.7×10-5g/mL,摩尔吸收光系数(ε)在4.33×104~1.04×105L/(mol@em).当用正负光吸收叠加时,灵敏度更高.探讨了反应条件、主要分析化学性质及三元缔合物的配合比(LA:EB:GEN=1:2:3).
关键词:
镧(Ⅲ),依文思蓝,氨基糖苷,抗生素,分光光度法