^(153)Sm-EDTMP 的纸色层行为研究

采用两种新的１５３Ｓｍ－ＥＤＴＭＰ纸色层展开体系：Ｖ（氨水）∶Ｖ（甲醇）∶Ｖ（水）＝０．１∶２∶４（ｐＨ＝１１．０－１４．０）和Ｖ（氨水）∶Ｖ（丙酮）∶Ｖ（水）＝０．２∶０．５∶４（ｐＨ＝７．０－９．０）来研究１５３Ｓｍ－ＥＤＴＭＰ的纸色层行为。新体系比原有体系Ｖ（吡啶）∶Ｖ（乙醇）∶Ｖ（水）＝１∶２∶４的展开时间短，分离效果好。其中（氨＋丙酮＋水）体系分离效率高，标记峰不存在拖尾，展开时间缩短１．５ｈ以上，适合于制备１５３Ｓｍ－ＥＤＴＭＰ的产品质量分析。

氰化钾水溶液的辐解——Ⅱ.用纸色层法测定K^(14)CN溶液辐解产物的产额

用纸色层法分离了γ辐照空气饱和的K^(14)CN水溶液的辐解产物,得到了八个产物。以载体法成功地抑制了主要辐解产物在纸色层过程中的分解。根据H_2O_2浓度剂量曲线指示体系中氧浓度的别辐解产物的产额为:R_f=0(未知物)G(-CN^-)=0.17,甘氨酸G(-CN^-)=0.06;R_f=0.21(未知物)G(-CN^-)=0.08,氰酸盐G(-CN^-)=0.06,甲酞胺G(-CN^-)=0.07;R_f=0.67(未知物)G(-CN^-)=0.03.甲醛G(-CN^-)=0.08;R_f=0.84(未知物) G(-CN^-)=0.05。求得缺氧时各别辐解产物的产额为:R_f=0(未知物)G(-CN^-)=0.17,甘氨酸G(-CN^-)=0.51;R_f=0.21(未知物) G(-CN^-)=0.83,氰酸盐G(-CN^-)=0.55,甲酰胺G(-CN^-)=0.93;R_f=0.67(未知物)G(-CN^-)=0.03,甲醛G(-CN^-)=0.11;R_f=0.84(未知物)G(-CN^-)=0.14。以化学法测定了G(CO_3^(2-))=0.33,CO_3^(2-)的产额与体系中氧浓度的变化无关。

稀土元素同位素质谱分析样品的纸色层法制备

Reported in this paper is a method of analysis of REE isotopes in RE minerals by paper chromatography-mass spectrometry. The pre-treatment of ore samples was followed by paper chromatography to obtain individual pure rate-earth elements. REE isotopic: analysis was carried out on a TSN-206 mass spectrometer. In paper chromatography butanone-9 M NH4SCN·HNO3 ( 150:2:1.5, V/V) was used as developing agent. In the light of the areas and colors of color spots on the paper chromatograms of rare-earth elements the contents of various rare-earth elements and Sm/Nd ratios can be roughly estimated. This method has the advantages of simple equipment, easy operation and direct estimation, as has been confirmed by the results of mass spectrometric analysis of Nd isotopes in some RE minerals. The relative standard deviations involved in most determined values are within the range of 0.02%.