P507萃淋树脂分离-电感耦合等离子体质谱法快速测定化探样品中的银

应用电感耦合等离子体质谱法(ICP-MS)测定化探样品中低含量的Ag时,常受到Zr、Nb氧化物离子91Zr16O和93Nb16O的严重干扰,使得低含量Ag结果误差较大.本文报道了一个简易的测定化探样品中Ag的新方法,将用于ICP-MS测定常规微量元素的溶液通过P507萃淋树脂交换柱,Zr、Nb等干扰元素被P507树脂强烈吸附,而Ag和内标元素Rh通过交换柱,实现了化探样品中待测元素Ag和内标元素Rh与干扰元素Zr、Nb的有效分离,Ag和Rh的回收率达到95％以上,检出限为0.05 μg/g,标准样品的测定结果准确可靠.该方法在测定常规微量元素的基础上,不需要另外称样及处理样品,相对于其他方法,流程简单、快速,适合化探样品Ag的测定,且树脂经氢氟酸处理后可重复使用,降低了实验成本.     

Preparation and characterization of magnetic resin made from chitosan and cerium

In this study,the water-based ferromagnetic fluid and magnetic resin made from chitosan and cerium complex(MRCCC) were successfully prepared by using the chemical co-precipitation technique and by the reversed-phase suspension cross-linking polymerization.MRCCC presented uniform and narrow particle size distribution as determined by the Laser Particles Sizer.The Inductively Coupled Plasma-Atomic Emission Spectrometry(ICP-AES),Fourier transform infrared spectroscopy(FT-IR),differential scanning calorimetry(DSC)and X-ray powder diffraction(XRD)study demonstrated that there were iron and cerium existing in MRCCC.The movement of MRCCC under magnetic field proved its magnetic property.The swelling kinetics in water or solutions with different pH indicated that MRCCC could be applied in solutions with pH greater than 1.0.The ferromagnetic fluid particles were stable in MRCCC soaked in solutions with pH >2.0.In view of these results,MRCCC can be used as material for separation,clarification,adsorption,sustained release and hydrolysis activity.     

CL—7402树脂萃取色谱法分离富集钯的研究

本文利用减压微色谱柱，研究了ＣＬ－７４０２树脂分离富集钯的性能。     

D301G树脂分离富集超痕量金的研究及应用

研究了用D3 0 1G大孔弱碱性苯乙烯系阴离子交换树脂对超痕量金的吸附性能。在φ为 1 %～ 2 0 %的王水介质中 ,Au与Cl-形成 [AuCl4]-络阴离子被D3 0 1G树脂吸附。吸附物灰化后 ,灰分与缓冲剂混合均匀 ,全部装入杯形电极进行光谱测定。方法检出限为 0 .0 8× 1 0 -9(1 0g样品 ) ,测定范围在 1～ 2 0 0 0 0ng内P -logC呈线性关系。方法经国家一级标准物质中金的测定验证 ,结果与标准值相符 ,1 2次测定的RSD为 9.1 %～ 1 3 .1 % ,可用于测定水系沉积物中的超痕量金。     

交换树脂—活性炭动态吸附极谱法测定矿石中的微量铂

矿石中微量铂经 71 7阴离子交换树脂 -活性炭动态吸附富集后 ,Pt的回收率在 95 %～ 1 0 3 %。以H2 SO4-NH4Cl-六次甲基四胺 -硫酸联氨为底液 ,极谱法测定。方法经GBW系列国家标准物质分析检验 ,结果与标准值相符 ,对w(Pt) =6.4× 1 0 -9的GBW 0 72 90国家标准物质测定 7次 ,RSD =7.1 %。方法适用于矿石中Pt含量在 1 0 -6～ 1 0 -9级的测定。     

用离子交换法分离测定废旧催化剂中铜,锌,铬,铝和钛

用732型强酸性阳离子交换树脂连续分离废旧催化剂中的铜、锌、铬、铝和钛5种组份。经标液和混合标液多次试验,回收率均在97—100％之间。通过样品分析表明,完全能满足回收废旧催化剂的分析要求。     

5-溴吡啶偶氮-H螯合树脂的合成及其吸附铜的性能研究

介绍了5-溴吡啶偶氮-H新型螯合树脂的合成方法。以微柱动态吸附法讨论了树脂对铜的吸附性能及分离富集条件。     

聚酰胺树脂富集分离-光度法连续测定铂和钯

试验了在柱层析操作条件下,聚酰胺树脂对铂和钯的吸附性能.结果表明,在 0.001～3.5 mol/L的HCl(或王水)介质中,聚酰胺树脂对铂和钯的吸附容量分别为20.92和19.20 mg/g,被酸性硫脲溶液洗脱后,用双十二烷基二硫代乙二酰二胺光度法测定.方法用于矿石中微量铂、钯的富集分离和测定,结果与等离子体发射光谱法及推荐值相符.铂、钯回收率均在93.7%～99.2%,相对误差分别为5.56%和4.44%.     

An Alternative Embedding Method for Thin Section Preparation of Lake Sediments

Embedding soil samples with Vestopal (Chemische Werke Hüls) or Palatal (BASF) polyester resin was described by Altemüller (1974), Altemüller and Vorbach (1987), or Tippkötter (1986). We have modified this method and applied it to lake sediments. The following steps are necessary: dehydration by acetone, replacement of acetone by Palatal, hardening of Palatal, sawing, polishing, and mounting on glass slides. The advantages compared to other methods are very good embedding qualities of different sediments and moderate costs of the embedding resin. The expensive and slow dehydration with acetone and the time consuming embedding are the disadvantages of this method.