骨中铊的微波消解ICP/AES标准加入测定法

建立骨骼的微波消解和金属毒物铊的ICP/AES标准加入分析方法。取0.2g骨粉于聚四氟乙烯消解管中,加入3.0mL浓硝酸及0.5mL双氧水,进行微波消解。结束后,用2%硝酸定容至10.0mL。根据标准加入法进行ICP-AES定量分析。方法的回收率为99.4%,检出限为5.1ng/g,线性范围为5~500 ng/mL。该方法操作简便,回收率高,检出限低,线性范围宽,可多元素同时测定,结果可靠。     

光谱法研究钢铁表面彩色Mo-S-Fe簇合物膜

研究MoS4^2-在钢铁表面发生配位反应形成的具有装饰效果的多种彩色Mo-S-Fe簇合物膜。FT-IR、F-IR、FT-Raman、XPS和AES分析表明,簇合物膜以Fe(Ⅲ)、Mo(Ⅵ)状态存在,膜内层以Fe(Ⅱ)、Mo(Ⅳ)和Mo(Ⅵ)共存,S和O都-2价,膜表面含少量 4、 6价硫。从AES深度分布曲线的组成恒定区求得各组成元素的相对原子百分比浓度和膜层厚度,反应时间越长,膜越厚,膜为多分子层结构。加热后膜层所含元素种类及价态不变,但元素分布有所改变。     

Summary of ISO/TC 201 standard: XXI. ISO 21270:2004—Surface chemical analysis—X‐ray photoelectron and Auger electron spectrometers—Linearity of intensity scale

This International Standard specifies two methods for determining the maximum count rate for an acceptable limit of divergence from linearity of the intensity scale of Auger and x‐ray photoelectron spectrometers. It also includes methods to correct for intensity non‐linearities so that a higher maximum count rate can be employed for those spectrometers for which the relevant correction equations have been shown to be valid. Copyright © 2004 John Wiley & Sons, Ltd.     

ICP-AES法测定油漆涂层中总铅含量的不确定度评定

根据EURACHEM/C ITAC 2000中的规定评定了ICP-AES法测定油漆中总铅含量的不确定度。结果表明,标准曲线拟合线性方程、标准工作液配制过程、样品重复性分析及消化过程中消化回收率是不确定度的主要来源。油漆涂层中的可溶性铅的检测结果可表示为:(162.7±19.0)mg/kg(k=2)。     

液相色谱-电喷雾质谱法分析脂肪醇聚氧乙烯醚硫酸钠

采用电喷雾质谱(ESI/MS)技术建立了脂肪醇聚氧乙烯醚硫酸钠(AES)的烷基碳链分布、乙氧基分布及平均EO数、平均相对分子质量的测定方法;采用液相色谱-电喷雾质谱(LC-ESI/MS)测定了AES中的游离十二烷基硫酸钠(SDS)的含量。将本方法应用于实际样品的测定,并与核磁共振法测得的平均EO数进行比较,二者的测定结果相当吻合,从而验证了本法的可靠性。     

Effects of nickel on the crystallization of Zr70Cu20Ni10 amorphous alloy

Differential scanning calorimetry (DSC) and x-ray diffraction (XRD) are employed to investigate the effects of nickel on the crystallization of the amorphous Zr₇₀Cu₂₀Ni₁₀ alloy. We have found that the crystallization process of the amorphous Zr₇₀Cu₂₀Ni₁₀ alloy is strongly influenced by the addition of nickel. Addition of 10 at% Ni to the Zr₇₀Cu₃₀ amorphous alloy makes the crystallization process proceed from a single-stage mode to a double-stage mode. The activation energy for crystallization of the amorphous Zr₇₀Cu₂₀Ni₁₀ alloy is calculated to be about 388kJ·mol^-1 on the basis of the Kissinger equation. The effects of nickel on the crystallization of the amorphous Zr₇₀Cu₂₀Ni₁₀ alloy are discussed in terms of the genetics of metals.     

小试金富集ICP-AES法同时测定试样中的铂、钯、金

文章报道了用小试金富集ICP AES法同时测定试样中的铂、钯和金 ,将 1 0～ 2 0g试样中的铂、钯、金富集在毫克量的银合粒中 ,制成溶液后用ICP AES法同时测定铂、钯和金。该方法的检出限 (μg·mL-1 )Pt,Pd ,Au分别为 0 0 1 ,0 0 0 5 ,0 0 1 ,相对标准偏差 (RSD ,n =1 0 )分别为 0 1 % ,0 1 2 % ,0 0 9% ,标准回收率均在 97%以上。生产实践表明 ,本方法是一种快速、简便、准确的分析方法 ,已被我们应用于测定样品中的铂 ,钯和金     

ICP-AES法测定金属硅中的Al、B、Ba、Ca、Cr、Cu、 Fe、Mg、Mn、Ni、Sr、Ti、V和Zn杂质元素

本文提供了一种测定金属硅中Ｂ,Ｆｅ,Ａｌ,Ｃａ,Ｍｎ等１４个杂质元素的ＩＣＰ－ＡＥＳ方法,在样品处理过程中,加入适量体积的甘露醇能够抑制Ｂ的挥发。用本方法测定了一个国家地球化学标准样（ＧＳＲ－４）,结果令人满意。     

ICP—AES法中稀土元素间的相互干扰研究

稀土元素的谱线较复杂,相互间存在着不同程度的干扰。本文着重研究了ＩＣＰ－ＡＥＳ法中,它们间的干扰情况,并用几种校正方法进行了比较。     

A quantum circuit design of AES requiring fewer quantum qubits and gate operations

Advanced Encryption Standard (AES) is one of the most widely used block ciphers nowadays, and has been established as an encryption standard in 2001. Here we design AES-128 and the sample-AES (S-AES) quantum circuits for deciphering. In the quantum circuit of AES-128, we perform an affine transformation for the SubBytes part to solve the problem that the initial state of the output qubits in SubBytes is not the |0>^⊗8 state. After that, we are able to encode the new round sub-key on the qubits encoding the previous round sub-key, and this improvement reduces the number of qubits used by 224 compared with Langenberg et al.’s implementation. For S-AES, a complete quantum circuit is presented with only 48 qubits, which is already within the reach of existing noisy intermediate-scale quantum computers.