CAJ | 학술논문

以2-(5-溴-2-吡啶偶氮)-5-二甲氨基苯胺(5-Br-PADMA)为络合剂,用非离子型表面活性剂Triton X-114浊点萃取样品溶液中的痕量钯。探讨了溶液pH、络合剂用量、平衡温度及时间、表面活性剂用量等实验条件对体系浊点萃取效率及测定灵敏度的影响,并详细研究了多种阴、阳离子对测定的干扰情况。在最佳条件下,钯浓度在4~80 ng·mL-1范围内与热透镜信号强度呈线性关系,方法的检出限为1．2 ng·mL-1,该法用于自来水中痕量钯的测定,加标回收率为95．5~96．7%,相对标准偏差为0．87%~2．49%。
이2-(5-추-2-필정우담)-5-이갑안기분알(5-Br-PADMA)위락합제,용비리자형표면활성제Triton X-114탁점췌취양품용액중적흔량파。탐토료용액pH、락합제용량、평형온도급시간、표면활성제용량등실험조건대체계탁점췌취효솔급측정령민도적영향,병상세연구료다충음、양리자대측정적간우정황。재최가조건하,파농도재4~80 ng·mL-1범위내여열투경신호강도정선성관계,방법적검출한위1．2 ng·mL-1,해법용우자래수중흔량파적측정,가표회수솔위95．5~96．7%,상대표준편차위0．87%~2．49%。
2-(5-bromo-2-pyridylazo)-5-di methylaminoaminobenzene(5-Br-PADMA) was selected as the complexing agent and oc-tylphenoxy-polyethoxyethanol(Triton X-114)was added as a nonionic surfactant. The main factors affecting the CPE efficiency such as pH, the concentrations of complexing agent and surfactant, equilibration temperature and centrifugation time were dis-cussed. Under optimum conditions,the analytical curve was linear for the concentration range of 4~80 ng·mL-1 and the detection limit was 1. 2 ng·mL-1 . The recovery of Pd was in the range of 95. 5~96. 7%. The relative standard deviation of 6 replicate deter-minations was 0. 87% ~2. 49%. The method was successfully applied to the extraction and determination of trace Pd in tap water.