CAJ | 학술논문

海水中溶解态磷酸盐的氧同位素组成(δ~(18) O_p)是海洋磷循环研究的有效示踪剂之一.海水中溶解态磷酸盐的富集、分离与纯化研究是测定海水磷酸盐氧同位素组成的基础.通过对国内外海水中磷酸盐氧同位素组成的测定方法进行查阅,选择改进后的MAGIC-CePO_4沉淀-阳离子交换树脂法对海水中溶解态磷酸盐进行富集、分离与纯化,并对实验条件进行了探讨.实验结果表明,所采用的方法对于3种不同溶液体系3个步骤的磷酸盐平均回收率分别为92.8%, 88.2%和98.3%,全流程磷酸盐回收率达到80%以上,因此可作为海水磷酸盐氧同位素测定的重要前提.
해수중용해태린산염적양동위소조성(δ~(18) O_p)시해양린순배연구적유효시종제지일.해수중용해태린산염적부집、분리여순화연구시측정해수린산염양동위소조성적기출.통과대국내외해수중린산염양동위소조성적측정방법진행사열,선택개진후적MAGIC-CePO_4침정-양리자교환수지법대해수중용해태린산염진행부집、분리여순화,병대실험조건진행료탐토.실험결과표명,소채용적방법대우3충불동용액체계3개보취적린산염평균회수솔분별위92.8%, 88.2%화98.3%,전류정린산염회수솔체도80%이상,인차가작위해수린산염양동위소측정적중요전제.
Dissolved phosphate oxygen isotope composition(δ~(18) O_p) was an effective tracer of ocean phosphate cycle.The preconcentration,separation and purification of phosphate was the foundation of seawater phosphate δ~(18) O analysis.Some popular seawater phosphate δ~(18) O analysis methods were reviewed.Then MAGIC-CePO_4 coprecipitation-cation exchange resin separation method was choosed to preconcentrate,separate and purify the phosphate.Some basic experiment conditions were also discussed.The results indicate that the mean phosphate recoveries of three procedures for three systems are 92.8%,88.2%,98.3%,and the total recovery of phosphate is more than 80%,so this method can be served as a basic precondition to determine the oxygen isotope composition of dissolved phosphate in seawater.