In order to eliminate the pitting and improve the surface morphology of cathode nickel,the influence of additives of boric acid and dodecyl sodium sulfate(SDS)on the process of nickel electrowinning from sulfate syste...In order to eliminate the pitting and improve the surface morphology of cathode nickel,the influence of additives of boric acid and dodecyl sodium sulfate(SDS)on the process of nickel electrowinning from sulfate system was studied by cathode polarization tests and nickel electrodeposition experiments.The experimental results show that the addition of boric acid can increase the cathode polarization while SDS can decrease the cathode polarization.Both boric acid and SDS are useful to eliminate the pitting on nickel deposits and improve the morphology of surface.Good deposit morphology with rare pitting and high current efficiency is favored by adding 10 g/L boric acid and 40 mg/L SDS in the electrolyte under the condition of nickel ion concentration of 80 g/L, sodium ion concentration of 10 g/L,pH of 3,current density of 220 A/m 2 and temperature of 70℃.展开更多
在p H 7.5体系中,表面活性剂十二烷基硫酸钠（SDS）可以显著增强度他雄胺的荧光强度,从而提出了测定人血清及度他雄胺软胶囊中度他雄胺含量的方法。对实验条件进行了优化,在优化条件下,在0.10~2.56μg·m L-1范围内,度他雄胺的荧光...在p H 7.5体系中,表面活性剂十二烷基硫酸钠（SDS）可以显著增强度他雄胺的荧光强度,从而提出了测定人血清及度他雄胺软胶囊中度他雄胺含量的方法。对实验条件进行了优化,在优化条件下,在0.10~2.56μg·m L-1范围内,度他雄胺的荧光强度与浓度呈良好的线性关系,相关系数R=0.997,方法的检出限为9.0 ng·m L-1,日内和日间精密度分别为0.22%~0.31%、0.28%~0.43%,回收率分别为94.0%~97.6%（胶囊）、93.6%~98.3%（血清）。实验结果表明本方法简便、快速、灵敏、准确,可用于实际样品分析。展开更多
文摘In order to eliminate the pitting and improve the surface morphology of cathode nickel,the influence of additives of boric acid and dodecyl sodium sulfate(SDS)on the process of nickel electrowinning from sulfate system was studied by cathode polarization tests and nickel electrodeposition experiments.The experimental results show that the addition of boric acid can increase the cathode polarization while SDS can decrease the cathode polarization.Both boric acid and SDS are useful to eliminate the pitting on nickel deposits and improve the morphology of surface.Good deposit morphology with rare pitting and high current efficiency is favored by adding 10 g/L boric acid and 40 mg/L SDS in the electrolyte under the condition of nickel ion concentration of 80 g/L, sodium ion concentration of 10 g/L,pH of 3,current density of 220 A/m 2 and temperature of 70℃.
