原子吸收分光光度法测定铜合金中的锡

一、前言铜合金中锡的分析大多是采用化学分析方法,其分析时间长,干扰元素多,在高速分析理论指导下,我们在310型原子吸收分析仪的基础上,采用火焰原子吸收法对铜合金中的锡进行了分析研究和测定,优选出测定铜合金中锡的最佳工作参数和条件,其优点是:分析速度快、简便,是工厂例行分析的可行方法。     

螯合树脂在线富集—火焰原子吸收光度法测定水中微量Cu,Pb,Zn,Cd

对螯合树脂在线富集，火焰原子吸光度法进行了条件试验，试验证实方法对Ｃｕ，Ｐｂ，Ｚｎ，Ｃ四种元素，检出浓度可达ｐｐｂ级，校准曲线线性，样品重现性及准确度可满足测定要求。     

石墨炉原子吸收分光光度法在电厂水质检测中的应用

电厂机组容量和参数越高,对热力系统的水汽品质要求越高。以发电机组水汽中铜、铁元素质量浓度的测定为例,从原子吸收分光光度法的基本原理、实验条件、仪器的使用维护及注意事项等方面进行分析,使用石墨炉原子吸收分光光度法得到更加准确的水质数据,保障发电机组的安全经济运行。     

火焰原子吸收法测定EMD中的铁含量

采用火焰原子吸收法测定EMD中的铁含量。介绍了铁的最佳测定条件及线性范围,并对测定中的干扰因素进行了综合考虑。该法具有灵敏度高、重现性好等特点。样品中铁含量测定的相对标准偏差(RSD)均小于2.0%(n=5);回收率为98.3%~101.7%,达到了实验室质量控制的要求。     

火焰原子吸收法在环境监测中的质量保证

火焰原子吸收法在环境监测中的质量保证河北省电力试验研究所（０５００２１石家庄）石景燕火焰原子吸收分光光度计是一种高精密度的分析仪器，它具有快速、准确等特点，能适应不同类型的样品。因此，火焰原子吸收法已广泛应用于环境监测中。环境样品往往是变化多端的，要...     

用火焰原子吸收法测定离子交换树脂中的铁离子含量

提出了火焰原子吸收测定法,详细说明了样品处理及测定,结果计算,检测限和准确度等.由检测结果可以看出,对不同铁离子含量的离子交换树脂,原子吸收法和化学滴定法检测结果的相对误差小于2%,原子吸收法的加标回收率在98%～103%,符合分析要求.     

火焰原子吸收法测定直接氧化锌中的锰

主要研究了在氨性溶液中用Fe(OH)3共沉淀富集直接氧化锌中的痕量锰，分离锌基体后，在5％的硝酸介质中，于原子吸收仪波长279．5m处进行测量．加标回收率在99．0％-104．4％，该法的最大相对标准偏差(RSD)为8．02％．     

冷原子吸收法测定锌锰电池中微量汞

采用冷原子吸收法对锌锰干电池中微量汞含量进行测定。汞蒸气发生与吸收装置由自制玻璃发生器、石英吸收池和简易大气采样器组成,设备简单易得,方法灵敏度高,选择性好,适于电池生产厂对电池质量的控制。     

Study on the determination of rare earth elements in coal ash by ICP-MS

Abstract

In this paper, an analytical method for the determination of rare earth elements in coal ash by mixed acid decomposition-inductively coupled plasma mass spectrometry was established. Using this method, the content of 15 rare earth elements in coal ash can be detected accurately, with the detection limit being 0.007–0.033?μg·g^?1, and the precision (RSD, n?=?6) less than 5.0%. This method was used to test the coal ash of different commercial coals. The results show that the light rare earth elements in coal ash account for 75.66%–82.61% of the total rare earth elements, among which, the total amount of rare earth elements in Yitai coal after being ashed is significantly lower than that of other coals.     

粉煤灰负压分选取灰技术的应用研究

负压取灰是利用负压风机所产生的负压将干灰直接取出的一种取灰方式，具有投资小、系统简单、可以同时实现输送和分选及密闭性好等优点，但是稳定性比较差，对管道和负压风机磨损较为严重。针对负压取灰存在的一些问题进行了研究分析，充分发挥负压取灰的优点，避免和减少负压取灰的缺点，使该技术更加完善，实用可靠，具有更大推广价值。     

Comparing properties of coal ash and alternative-fuel ash

The results of investigating ash produced in burning alternative kinds of fuel are discussed. Its impact on the environment is evaluated, and possibilities of recovering it are studied.     

流动注射石英管原子吸收法测定铅锭中痕量砷

采用流动注射石英管原子吸收法测定铅锭中痕量砷。对仪器工作条件、测定体系酸度、共存离子干扰等作了试验。此方法线性相关系数大于0 9990,检出限为0 065μg·L-1,RSD为1 9%～5 4%,标准加入回收率在96%～102%之间。     

Structure and dielectric properties of Cu and (K,Na) doped SrBi2Nb2O9 ferroelectric ceramics

Ferroelectric ceramics, SrBi₂Nb₂O₉ (SBN), Sr_0.8Cu_0.2Bi₂Nb₂O₉ (SCBN) and Sr_0.8K_0.1Na_0.1Bi₂Nb₂O₉ (SKNBN) were prepared by a solid state reaction process. X-ray diffraction analysis shows that the alkali and Cu almost diffuse into the SBN lattice to form a solid solution during sintering and some slight secondary phases was detected. The effect of alkali and Cu on dielectric properties of the SBN ceramics was discussed. The dielectric loss factor of (K,Na) doped SBN ceramics degraded considerably to 0.01 and their frequency and temperature stabilities were enhanced. The dielectric constant was enhanced by approximately 60% and the Curie temperature (Tc) was also improved for Cu doped SrBi₂Nb₂O₉ ceramics.     

原子吸收光谱法测定浸渍溶液中高含量镍

提出运用原子吸收光谱法测定镉镍电池浸渍溶液中高含量镍。考察了镍最佳测定条件以及呈良好线性范围的浓度,并在样品测定中对干扰因素进行了综合考虑。该方法具有灵敏度高、干扰小、操作步骤简单、分析周期短等特点。其相对标准偏差均不大于1.0%(n=10),标准加入回收率均能保持在97.0%～100.0%(n=10)范围内。方法完全达到了实验室仪器分析质量与质量控制的要求。     

原子荧光光谱法测定浆层纸中的痕量汞

利用原子荧光光谱法测定了浆层纸中的痕量汞。对酸度控制、仪器条件选择和硼氢化钾的用量等进行了研究,方法的检出限为0.083μg/L,精密度为1.1%,回收率为98.6%~105.3%。此方法的选择性好,灵敏度较高,获得的结果令人满意。     

Dielectric and piezoelectric properties of (K0.5Na0.5)(Nb0.97Sb0.03)O3 ceramics doped with Bi2O3

In this study, to develop the optimal composition of ceramics for low loss piezoelectric actuator and ultrasonic motor applications, (K_0.5Na_0.5)(Nb_0.97Sb_0.03)O₃?+?0.009 K_5.4Cu_1.3Ta₁₀O₂₉?+?0.1wt%Li₂CO₃?+?xwt%Bi₂O₃(x?=?0?~?0.9) lead-free piezoelectric ceramics with a fixed quantity of 0.009 K_5.4Cu_1.3Ta₁₀O₂₉ (abbreviated as KCT) were manufactured using the conventional solid-state solution processes. The effects of Bi₂O₃ addition on the dielectric and piezoelectric properties were then investigated. From the X-ray diffraction analysis result the specimens demonstrated orthorhombic symmetry when Bi₂O₃ was less 0.6?wt%, a pseudo-cubic phase appeared when Bi₂O₃ was 0.9?wt%. SEM images indicate that a small amount of Bi₂O₃ addition affect the microstructure. The piezoelectric properties of (K_0.5Na_0.5)(Nb_0.97Sb_0.03)O₃ ceramics were greatly improved by a certain amount of Bi₂O₃ addition. Excellent properties of density?=?4.54?g/cm³, relative densities?=?98.5?%, k _p?=?0.468, Q _m?=?1,715 and d ₃₃?=?183 pC/N were obtained with a composition of 0.3?wt% Bi₂O₃