ICP-AES法同时测定镨钕镝铁硼合金中的铝、铜、硼、镍、钴、锰含量

提出了ICP-AES法同时测定镨钕镝铁硼合金中铝、铜、硼、镍、钴、锰元素的分析方法。研究了谱线的选择,考查了基体含量变化、酸度、功率和雾化压力对测定的影响,测定了本方法分析结果的准确度和回收率。结果表明:该方法快速、准确,RSD均小于4%,回收率在94.10%~105.1%之间,与化学分析方法比对试验,分析结果一致。该方法能满足产品生产和质量控制的日常分析要求。     

地球化学样品中硫、铁、铋、铅、锑、砷、汞等元素的组合高效测定方法

通过王水-水浴溶解样品对同一底液采用不同的处理手段后, 实现电感耦合等离子体发射光谱仪测定铁、硫, 电感耦合等离子体质谱仪测定铋和铅, 原子荧光光谱仪测定锑、砷、汞等元素。方法的准确度在0.001~0.035之间, 精密度在0.076%~8.90%之间。该方法通过共享使用同一底液, 3种仪器设备分别测试, 达到组合、高效测定多种元素的目的, 具有操作简单, 测定范围广, 环境要求低, 抗干扰能力强, 能够满足现行规范《多目标区域地球化学调查规范(1: 250 000)》(DZ/T 0258-2014)要求。      

ICP-AES法同时测定混合铅锌精矿中砷、铋、镉、钴、铜、镍、锑的研究

混合铅锌精矿化学分析方法中的砷、镉、铜等杂质的含量,是采用每个元素分别测定的方法,测定周期长,分析成本高。因此,作者提出采用一次溶样,用电感耦合等离子体原子发射光谱法(即ICP-AES法)对原标准中砷、镉、铜同时进行测定,并增加了钴、铋、镍、锑4种杂质元素的测定。经大量的试验和实际样品测定,结果表明该方法快速,准确、可靠,加标回收率均在95%~106%之间。能够满足混合铅锌精矿中砷、铋、镉、钴、铜、镍、锑含量的测定要求。     

高速钢轧辊中钨、锰、钼、钴、铜、钒、铬联合快速测定

用磷酸、高氯酸统一溶解处理方法制备试液,用同一母液分别以光度法和滴定法测定W、Mn、Mo、Co、Cu、V、Cr元素的含量。通过控制测定的酸度,各元素线性良好,分析误差完全在国标误差范围内。该方法缩短了分析周期,精密度、准确度高,钨、锰、钼、钴、铜、钒、铬的RSD分别≤1.42%、≤1.26%、≤2.12%、≤6.72%、≤0.53%、≤1.53%、≤5.73%,能够满足快速测定的要求。     

粉末压片制样-X射线荧光光谱法测定铁矿石中钾、钠、钛、铅、锌、砷

应用X射线荧光光谱仪测定铁矿石中的钾、钠、钛、铅、锌、砷含量,采用粉末压片法制样,并研究了制样的条件,确定了仪器最佳参数,建立了标准曲线。通过对比分析,该方法在准确度和分析速度上能满足生产要求。     

负载泡沫塑料富集发射光谱法测定化探样品中痕量金、铂、钯

研究了负载三正辛胺泡沫塑料振荡富集发射光谱测定化探样品中痕量金、铂、钯的方法．并对方法的准确度、精密度、检出限作了相应的讨论。实验表明,该方法同时测定金、铂、钯,准确度高,精密度好(RSD为5．8％～19．7％),检出限(ng／g)为Au 0．5,Pt 1．0,Pd 1．5。该方法可以满足地质化探样品的分析测定要求。     

ICP-AES法测定低、微碳铬铁中硅、锰和磷含量

介绍了邯钢技术中心开发的用ICP-AES法同时测定低、微碳铬铁中硅、锰和磷的方法。试样先用盐酸溶解,在加入一定量的过氧化氢加热,然后定容。结果表明,该方法的准确度和精密度都能满足国标要求,效果良好。该法与传统化学湿法相比,分析时间可由原来的8h缩短到3h,提高了工作效率。     

元素分析仪同时测定土壤中碳、氮、硫含量的方法研究

建立元素分析仪同时测定土壤中碳、氮、硫含量的检测方法,用于解决常规检测方法的弊端,并且数据准确度好,相对标准偏差(RSD)分别在0.94％～3.15％,均满足试验要求.该方法快速简便、大大降低分析成本,适用于土壤样品的批量检测.     

ICP-AES法测定稀土系贮氢合金中铁、镁、锌、铜量

利用等离子发射光谱仪测定稀土系贮氢合金中铁、镁、锌、铜的含量,测定范围铁、镁、铜0.0050%~0.30%,锌0.010%~0.10%。通过不同实验,研究了各种仪器条件和基体干扰等因素对测定的影响,进行回收率和精密度实验。该方法具有灵敏度高、稳定性好、准确度、精密度好等优点,能准确测定稀土系贮氢合金中低含量的铁、镁、锌、铜的含量。方法精密度RSD均小于6%,回收率在95%~105%之间,满足分析检测的要求。     

高速钢轧辊中W、Mn、Mo等7元素的联合快速测定

用磷酸、高氯酸统一溶解处理方法制备试液,用同一母液分别以光度法和滴定法测定W、Mn、Mo、Co、Cu、V、Cr元素的含量。通过控制测定的酸度,各元素线性良好,W、Mn、Mo、Co、Cu、V、Cr的RSD分别≤1.42%、≤1.26%、≤2.12%、≤6.72%、≤5.73%、≤3.53%、≤1.53%。该方法缩短了分析周期,精密度和准确度高,能够满足快速测定的要求。     

火焰原子吸收光谱法测定锌及锌合金中的镁量

文章对国家标准分析方法GB／T12689．7—2004锌及锌合金中镁的测定范围做了扩展，对方法的下限延伸至0．0020％，在0．0020％～0．010％范围做了杂质干扰实验、准确性实验和精密度实验，结果表明该方法回收率好，精密度好，在0．0020％～0．010％范围满足分析要求。     

V-N微合金化生产非调质N80石油管

采用V—N合金微合金化和控温轧制技术取代传统的调质生产方式，获得了具有稳定性能，满足API Spec 5 Cr标准要求的N80级油井管产品。现场轧制实验表明：此技术是可行的，不仅简化了生产工序，而且降低了钢材成本。     

Proceedings of the American Psychological Association, Incorporated, for the year 1966: Minutes of a Special Meeting of the Council of Representatives, March 10-12, 1966, Washington, D.C.

At its meeting in Chicago in September 1965, the Council of Representatives voted to request the Board of Directors to call a special meeting of the Council which would permit a full discussion of the activities of the Association and of measures that might increase the Council's effectiveness in guiding these activities. In response to this request, President Hobbs called a special meeting to convene in Washington, D. C., March 10, 1966. This document presents the minutes of this meeting's debates, activities, and rulings. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

常压烧结SiC超光滑抛光性能研究

采用常压烧结的方法制备了反射镜用SiC陶瓷材料。研究了金刚石、氧化铬(Cr_2O_3)和二氧化硅(SiO_2)_3种磨料对常压烧结SiC陶瓷抛光性能的影响。结果表明,常压烧结SiC的各项物理性能满足反射镜基底材料的基本要求;金刚石磨料与常压烧结SiC陶瓷的硬度差最小,且超顺滑抛光过程中金刚石磨粒形状在SiC陶瓷表面产生的位错、空位等缺陷最少,因此采用金刚石磨料时,常压烧结SiC陶瓷的表面质量最好,其表面粗糙度值(RMS)为0.789 nm,面形精度为0.007λ(λ=0.632 8μm),满足反射镜的使用要求。     

Social consequences of apologetic, assertive, and aggressive requests.

Each of 60 female undergraduates was asked by a female confederate (CF) to leave a room. The CF made the request, using an aggressive, assertive, or apologetic expressive style, after the female experimenter had previously told each S that it was important for her to stay in the room (high sacrifice) or had not said anything about staying in the room (low sacrifice). The manipulation of the CF's expressive style significantly affected Ss' ratings of the CF such that the aggressive style produced more negative social evaluations than both the apologetic and assertive styles. Increasing the sacrifice involved in Ss' compliance to the request significantly reduced both the amount and speed of compliance. Results suggest that to teach clients how to maintain positive social relationships, assertion trainers should continue to focus on teaching the distinction between assertion and aggression. With regard to the instrumental effectiveness of a request, findings suggest that situational constraints on the target of the request are more important than the way in which the request is phrased. (22 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Childhood abuse, personality disorder and chronic fatigue syndrome

In a recent article entitled, Requests "for inappropriate" treatment based on religious beliefs, Orr and Genesen claim that futile treatment should be provided to patients who request it if their request is based on a religious belief. I claim that this implies that we should also accede to requests for harmful or cost-ineffective treatments based on religious beliefs. This special treatment of religious requests is an example of special pleading on the part of theists and morally objectionable discrimination against atheists. It also provides an excellent illustration of how different the practices of religion and ethics are.     

Reinforcement, behavior constraint, and the overjustification effect.

Assessed the reinforcement–overjustification effect relationship in 48 4th and 5th graders. Four levels of the behavior constraint–reinforcement variable were manipulated: attractive reward, unattractive reward, request to perform, and a no-reward, no-request control. Only the unattractive reward and request groups showed the performance decrements that suggest the overjustification effect. The attractive reward group was significantly different from these 2 groups on this measure. It is concluded that reinforcement does not cause the overjustification effect. It is suggested that the behavior constraining aspect of a contingency produced the effect, whereas the reinforcement, or reward value aspect, led to the opposite effect—an increase in interest and postcontingency performance. (32 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

X射线荧光光谱法测定硅、磷、铬、锰、铁

以[ KNO3+NaNO3+Sr( NO3)2]为氧化剂,Na2CO3为助熔剂,Li2B4O7作熔剂,采用熔片法制备样片,建立了高碳铬铁、碳素铬铁、炉料级铬铁中硅、磷、铬、锰、铁的X射线荧光光谱分析方法,本方法采用国家标准样品和分析试样绘制了工作曲线,进行了精密度和准确度试验,其测定值与标准值相符,并有良好的精密度,完...     

Influence of machining temperature on the surface damage,residual stress,and texture of hot-pressed beryllium

The effect of lathe machining temperature ranging from room to 400°C on the depth of twinning, extent of microcracking, residual stress, and texture of hot-pressed, S200-type beryllium was investigated. It was shown that twinning, microcracking, and residual stress were essentially eliminated when machining was performed above the ductile-to-brittle fracture transition range at 400°C. This behavior has been related to the operation of multiple slip systems, which, in terms of the von Mises criterion, satisfies the condition for uninhibited deformation. Minimization of residual stress was attributed to recovery resulting primarily from dislocation annihilation and climb, the latter giving rise to the formation of welldefined low-angle boundaries and stable hexagonal networks adjacent to the machined surface.     

HLB型悬臂液下泵在锌电解工序中的应用与改进

文章从结构、材质方面分析了HLB型悬臂液下泵的可靠性及安全性，提出了对泵操作维护的具体要求，对该泵的改进展开了有益的探讨，并成功应用于生产实践。