次灵敏线空气—氢火焰原子吸收光谱法测定天然水中钠和钾

研究了原子吸收法在次灵敏特征谱线用空气-一氢火焰测定天然水中钠和钾的方法、相对标准偏差小于4.0%,加标回收率在96%-104%之间,方法简单易行,准确可靠。     

流动注射在线预富集-火焰原子吸收法测定水样中Cr(Ⅵ)*

用二乙基硫代氨基磺酸钠（NaDDTC)作为螯合剂的流动注射在线配合C18固相萃取预富集联用火焰原子吸收测定体系,在线分离测定水体中的Cr(Ⅵ),分析试样速率为50个／h,对含Cr(Ⅵ)0.02mg／L和0.15mg/L的标准 溶液进行8次平行测定,其相对标准偏差分别为6.90%和2.18%,相对误差为2.11%-4.75%,方法检测限为4.92ug/L。富集时间为40s,与直接进样比较,灵敏度提高8倍。Cr（Ⅲ)的含量即使达到10mg/L也不影响测定。     

Spent rechargeable lithium batteries in e-waste: composition and its implications

The amount of spent rechargeable lithium batteries （RLBs） is growing rapidly owing to wide application of these batteries in portable electronic devices and electric vehicles, which obliges that spent RLBs should be handled properly. Identification of spent RLBs can supply fundamental information for spent RLBs recycling. This study aimed to determine the differences of physical components and chemical compositions among various spent RLBs. All the samplings of RLBs were rigorously dismantled and measured by an inductive coupled plasma atomic emission spectrometer. The results indicate that the average of total weight of the separator, the anode and the cathode accounted for over 60% of all the RLBs. The weight ratio of valuable metals ranged from 26% to 76%, and approximately 20% of total weight was Cu and Al. Moreover, no significant differences were found among different manufacturers, applications, and electrolyte types. And regarding portable electronic devices, there is also no significant difference in the Co-Li concentration ratios in the leaching liquid of RLBs.     

环境应急事件中快速测定水中重金属项目的研究——以铜、锌为例

文章针对环境应急事件中如何快速测定重金属项目进行了研究。水中重金属的仪器测定方法有若干种,但实验室中的方法存在分析时间较长、操作难度较大及仪器难以携带等局限性。本文研究了使用便携式多参数水质检测一体机测量水中铜、锌项目的方法,得到了铜在相对范围内可直接测量、锌需要扣除铜的干扰系数才可准确测量的结论。     

丁二酮肟分光光度法测定硝酸镍生产废水中的镍

将丁二酮肟分光光度法应用于硝酸镍生产废水中镍的测定,以过硫酸铵作氧化剂,丁二酮肟为显色剂,在波长465nm处测定硝酸镍生产废水中的镍.     

关于臭氧—靛蓝二磺酸钠分光光度法（GB／T15437—95）问题探讨

本文就臭氧—靛蓝二磺酸钠（ Ｉ Ｄ Ｓ）分光光度法（ Ｇ Ｂ／ Ｔ１５４３７－ ９５）中存在的问题进行了深入探讨,指出其臭氧摩尔质量（ １２ Ｏ３）为２４００ｇ／ｍ ｏｌ,而不是１２００ｇ／ｍ ｏｌ,从而纠正了方法中的错误。