A new method for the determination of trace non-rare earth elements in high purity rare earth oxides by ICP-AES with preconcentration on an active carbon-silica gel microcolumn in a flow injection system is described ...A new method for the determination of trace non-rare earth elements in high purity rare earth oxides by ICP-AES with preconcentration on an active carbon-silica gel microcolumn in a flow injection system is described in this paper. Experimental parameters such as pH, flow rate,reagent concentration,length of reaction coil,eluent acidity,etc. were optimized. In the buffer solution of NH3. H2O/NH4Cl at pH 4. 6,Al,Cr,Cu,Fe, Pb, V and Zn can be preconcentrated and then eluted with 4. 5 mol/L nitric acid utilizing stop-flow technique. The enrichment factors were in range of 8. 1￣12. 6 with detection limits of μg/m level ,and the RSD with metals at μg/g level were 2. 3￣5. 0% (n= 7). The method proposed can reduce the matrix interference effectively , and has been applied to the determination of non-rare earth metals atμg/g level in high purity Eu2O3 with satisfactory results.展开更多
The VOF method is used to simulate the dynamics of a droplet interacting with a structure consisting of an array of microcolumns mounted on a flat surface.Such a specific configuration is intended to mimic the typical...The VOF method is used to simulate the dynamics of a droplet interacting with a structure consisting of an array of microcolumns mounted on a flat surface.Such a specific configuration is intended to mimic the typical properties of lotus leaves,which typically display regularly arranged micron-scale papillary structures.After setting the initial velocity of the simulated droplet on the basis of practical considerations,an analysis is conducted about the effect of the characteristic size of the microstructure on the apparent contact angle.The pressure variation in the microstructure caves is also examined.The simulation results show that the change of the contact angle of the droplet in the quasi-static state is consistent with theoretical calculations and the contact angle in the dynamic state is smaller than that in the quasi-static state.Moreover,under dynamic conditions,the pressure fluctuation in the microstructure cave depends essentially on the characteristic size of the microstructure.展开更多
目的:探讨微柱凝胶法行不规则抗体筛查和交叉配血试验的应用价值。方法:选取2023年2月至2024年8月本院收治的1428例需临床输血患者作为研究对象。采集供血者和受血者血液样本,分离供血者与受血者红细胞,分别使用凝聚胺法、微柱凝胶法筛...目的:探讨微柱凝胶法行不规则抗体筛查和交叉配血试验的应用价值。方法:选取2023年2月至2024年8月本院收治的1428例需临床输血患者作为研究对象。采集供血者和受血者血液样本,分离供血者与受血者红细胞,分别使用凝聚胺法、微柱凝胶法筛查输血者血液样本的不规则抗体,对于筛查结果呈阳性的样本,再用谱细胞鉴定抗体。对比两种检查方式检查时间、检验结果。以谱细胞鉴定结果作为“金标准”,分析两种检查方式对不规则抗体检出情况以及对ABO血型系统(ABO Blood Group System,ABO)、Rh(D)血型系统(Rhesus(D)Blood Group,Rh(D))血型鉴定准确率。结果:微柱凝胶法检查时间明显长于凝聚胺法(P<0.05);微柱凝胶法检测次侧阳性率明显较凝聚胺法高(P<0.05);两种方法的主侧阳性率、总阳性率、假阳性率无明显差异(P>0.05);所有患者经谱细胞鉴定显示不规则抗体阳性率为20例(1.40%)。微柱凝胶法检测不规则抗体阳性率为1.40%(20/1428),灵敏度为100.00%(20/20);凝聚胺法检测不规则抗体阳性率为9.80%(14/1428),灵敏度为70.00%(14/20),微柱凝胶法检测不规则抗体灵敏度明显高于凝聚胺法(P<0.05);微柱凝胶法Rh(D)、ABO血型鉴定准确率明显高于凝聚胺法(P<0.05)。结论:与凝聚胺法相比,微柱凝胶法检查时间较长,但其灵敏度高,利于提高输血安全性,必要时可联合两种检查方式检测,为临床输血提供可靠参考。展开更多
文摘A new method for the determination of trace non-rare earth elements in high purity rare earth oxides by ICP-AES with preconcentration on an active carbon-silica gel microcolumn in a flow injection system is described in this paper. Experimental parameters such as pH, flow rate,reagent concentration,length of reaction coil,eluent acidity,etc. were optimized. In the buffer solution of NH3. H2O/NH4Cl at pH 4. 6,Al,Cr,Cu,Fe, Pb, V and Zn can be preconcentrated and then eluted with 4. 5 mol/L nitric acid utilizing stop-flow technique. The enrichment factors were in range of 8. 1￣12. 6 with detection limits of μg/m level ,and the RSD with metals at μg/g level were 2. 3￣5. 0% (n= 7). The method proposed can reduce the matrix interference effectively , and has been applied to the determination of non-rare earth metals atμg/g level in high purity Eu2O3 with satisfactory results.
基金funding from the China Scholarship Council(CSC)and Basic Scientific Research Projects of Liaoning Provincial Department of Education:‘Design and manufacture of bionic antifogging surface of optical glass lens based on nanosecond laser’(LJKMZ20220827).Y received the grant.
文摘The VOF method is used to simulate the dynamics of a droplet interacting with a structure consisting of an array of microcolumns mounted on a flat surface.Such a specific configuration is intended to mimic the typical properties of lotus leaves,which typically display regularly arranged micron-scale papillary structures.After setting the initial velocity of the simulated droplet on the basis of practical considerations,an analysis is conducted about the effect of the characteristic size of the microstructure on the apparent contact angle.The pressure variation in the microstructure caves is also examined.The simulation results show that the change of the contact angle of the droplet in the quasi-static state is consistent with theoretical calculations and the contact angle in the dynamic state is smaller than that in the quasi-static state.Moreover,under dynamic conditions,the pressure fluctuation in the microstructure cave depends essentially on the characteristic size of the microstructure.
文摘目的:探讨微柱凝胶法行不规则抗体筛查和交叉配血试验的应用价值。方法:选取2023年2月至2024年8月本院收治的1428例需临床输血患者作为研究对象。采集供血者和受血者血液样本,分离供血者与受血者红细胞,分别使用凝聚胺法、微柱凝胶法筛查输血者血液样本的不规则抗体,对于筛查结果呈阳性的样本,再用谱细胞鉴定抗体。对比两种检查方式检查时间、检验结果。以谱细胞鉴定结果作为“金标准”,分析两种检查方式对不规则抗体检出情况以及对ABO血型系统(ABO Blood Group System,ABO)、Rh(D)血型系统(Rhesus(D)Blood Group,Rh(D))血型鉴定准确率。结果:微柱凝胶法检查时间明显长于凝聚胺法(P<0.05);微柱凝胶法检测次侧阳性率明显较凝聚胺法高(P<0.05);两种方法的主侧阳性率、总阳性率、假阳性率无明显差异(P>0.05);所有患者经谱细胞鉴定显示不规则抗体阳性率为20例(1.40%)。微柱凝胶法检测不规则抗体阳性率为1.40%(20/1428),灵敏度为100.00%(20/20);凝聚胺法检测不规则抗体阳性率为9.80%(14/1428),灵敏度为70.00%(14/20),微柱凝胶法检测不规则抗体灵敏度明显高于凝聚胺法(P<0.05);微柱凝胶法Rh(D)、ABO血型鉴定准确率明显高于凝聚胺法(P<0.05)。结论:与凝聚胺法相比,微柱凝胶法检查时间较长,但其灵敏度高,利于提高输血安全性,必要时可联合两种检查方式检测,为临床输血提供可靠参考。
