NING Yuantao
,
S. H. Whang Institute of Precious Metals
,
Kunming
,
Yunnan
,
China. Barnett Institute of Northeastern University
,
Boston
,
MA 02115
,
U. S. A.
材料科学技术（英文）
Various Mo-base alloys with high melting temperature were processed into ribbons and foils by the arc melt-spinning and the arc melt hammer-anvil technique. The preparation of ribbon and foil was introduced. The mechanical proper- ties, the surface topology and the microstructure of rapidly solidified Mo-base alloys containing B were examined. A strong grain refinement and a strong age-hardening response were observed on the as-quenched and the age specimens, the precipitates which cause age hardening were identified to be Mo_2B in Mo-B alloys, Mo_2B and ZrB_2 in Mo-Zr-B alloys, and Mo_2B and ThB_4 in Mo-Th-B alloys. The results indicate that the high strength Mo-base alloys containing boride precipitates can be developed by rapid solidifica- tion technique.
关键词:
Mo-alloys
,
null
,
null
,
null
,
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范艳群
,
许建中
,
徐询
,
刘亿婕
,
许晨
应用化学
doi:10.3724/SP.J.1095.2014.30299
建立了同时检测葡萄糖醛酸和葡萄糖醛酸内酯的离子排斥色谱法.采用Boston HC-B75 H+色谱柱进行分离,以5 mmol/L H2SO4水溶液为流动相,流速0.6 mL/min,柱温25℃,紫外检测波长220 nm;根据外标法定量,葡萄糖醛酸和内酯分别在10～1200 mg/L和5～600 mg/L范围内线性良好(r＞0.9999);葡萄糖醛酸、葡萄糖醛酸内酯的最低检测限及定量限均分别为0.1和0.3 mg/L,精密度实验RSD分别为1.00％和0.35％,平均回收率分别为99.69％和98.21％.该检测方法简便、快速、灵敏,可用于葡萄糖醛酸和葡萄糖醛酸内酯的同时测定.温度、pH值和溶剂对葡萄糖醛酸稳定性有影响,可为葡萄糖醛酸的分析与制备研究提供参考依据.
关键词:
离子排斥色谱
,
葡萄糖醛酸
,
葡萄糖醛酸内酯
,
稳定性
