GB/T 3253.6-2008 锑及三氧化二锑化学分析方法 硒量的测定 原子荧光光谱法
作者:标准资料网 时间:2024-05-15 17:50:52 浏览:8057
来源:标准资料网
基本信息
| 标准名称： | 锑及三氧化二锑化学分析方法 硒量的测定 原子荧光光谱法 |
| 英文名称： | Methods for chemical analysis of antimony and antimony trioxide - Determination of selenium content - Atomic fluorescence spectrometer method |
| 中标分类： |
冶金 >>
金属化学分析方法 >>
重金属极其合金分析方法 |
| ICS分类： |
冶金 >>
有色金属 >>
其他有色金属及其合金
|
| 替代情况： | 替代GB/T 3253.5-2001;GB/T 3254.6-1998 |
| 发布部门： | 中华人民共和国国家质量监督检验检疫总局 中国国家标准化管理委员会 |
| 发布日期： | 2008-03-31 |
| 实施日期： | 2008-09-01 |
| 首发日期： | 1982-06-21 |
| 作废日期： | |
| 主管部门： | 中国有色金属工业协会 |
| 提出单位： | 中国有色金属工业协会 |
| 归口单位： | 全国有色金属标准化技术委员会 |
| 起草单位： | 锡矿山闪星锑业有限责任公司、中国有色金属工业标准计量质量研究所 |
| 起草人： | 吴东华、宋应球、毛小红 |
| 出版社： | 中国标准出版社 |
| 出版日期： | 2008-09-01 |
| 页数： | 5页 |
| 计划单号： | 20060734-T-610 |
适用范围
本部分规定了锑及三氧化二锑中硒量的测定方法。本部分适用于锑及三氧化二锑的测定。测定范围：0.0003%--0.050%。 本部分代替ＧＢ／Ｔ３２５３．５—２００１《锑化学分析方法 硒量的测定》、ＧＢ／Ｔ３２５４．６—１９９８《三氧化二锑化学分析方法 硒量的测定》。与ＧＢ／Ｔ３２５３．５—２００１、ＧＢ／Ｔ３２５４．６—１９９８ 相比，本部分有如下变动：
———３，３′二氨基联苯胺分光光度法改为原子荧光光谱法；
———测定下限进行了延伸；
———增加了精密度与质量保证和控制条款。
前言
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目录
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引用标准
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所属分类： 冶金 金属化学分析方法 重金属极其合金分析方法 冶金 有色金属 其他有色金属及其合金
Product Code:SAE J2829
Title:Pedestrian Visibility - Low Beam Optimization to Reduce Night-time Fatalities (STABILIZED Feb 2011)
Issuing Committee:Road Illumination Devices Standards Committee
Scope:The primary purpose of vehicle forward lighting is not to see the world but to see the road! In their simplest form, headlights help drivers negotiate a safe path on the road. They do this by lighting the roadway according to (a multitude of) specific standards.For decades, discussions concerning the niceties of illuminating potential obstacles in the roadway were little more than an academic pursuit as there simply were not sufficient lumens available from filament light sources to achieve all of the desired tasks no matter how worthy they might be. Not unexpectedly, the technology has evolved with the introduction of high output metal-halide sources, multi-task standards combined with multilevel lighting devices and discrete LED sources offering high luminous efficiencies and the means to deliver the light where it can be most useful. The question now becomes one of determining where the available light should be directed.Every standard advisory group, industry, manufacturer and every driver might have their particular favorite approach to the question of how best to illuminate the road, but few would disagree that a single, vulnerable set of candidates to benefit from improved forward lighting exist. These are pedestrians walking in the roadway and unfortunately, they can exist literally anywhere in the road scene. Some regions of the road are clearly more perilous than others, specifically those located where the light is weaker on the side of the beam directed toward the opposing lane (the left side in the majority of countries). Work by Sullivan and Flannagan (2001), Kosmatka (2003) and Sullivan (2007) has demonstrated the fatality rate (2300 fatalities) and vulnerability (twice as many left-crossing than right-crossing) of pedestrians in the roadway. This could lead to the conclusion that it is necessary to put more lumens in the opposing lane (left) side of the roadway. However, this is the simple answer; the hard questions are how much light, where on the left and how can this be achieved?The low beam pattern, by its nature, is a compromise between the need to provide adequate illumination of the road ahead of the vehicle while minimizing the effects of glare to oncoming road users. This means that any study to identify improvements in the low beam to achieve better pedestrian visibility must respect the balance between the needs of the vehicle driver and the other road users.While various approaches to reduce pedestrian fatalities are being pursued it is clear that the effectiveness of headlighting can play an important role. As noted earlier, the performance of the low beam light distribution has improved with the introduction of new headlamp technologies and more efficient light sources. However, the compromise between providing adequate forward illumination while minimizing the effects of glare to the other road users remains a constraint.With research findings providing a clearer indication of the nature of the collisions with pedestrians and identifying critical areas in the road scene it is now appropriate to review the requirements of the low beam headlamp system with a focus upon mitigating the pedestrian fatalities.【英文标准名称】:Particularrequirementsbattery-operateddrills
【原文标准名称】:由蓄电池供电的电钻的特殊要求
【标准号】:UL745-4-1-1995
【标准状态】:作废
【国别】:美国
【发布日期】:1995-03-23
【实施或试行日期】:
【发布单位】:美国保险商实验所(UL)
【起草单位】:UL
【标准类型】:()
【标准水平】:()
【中文主题词】:规范(验收);电气工程;电气安全;危害;设计;安全要求;工具;手工工具;蓄电池组;钻削;定义
【英文主题词】:Batteries;Definition;Definitions;Design;Drilling;Electricalengineering;Electricalsafety;Handtools;Hazards;Safetyrequirements;Specification(approval);Tools
【摘要】:
【中国标准分类号】:K64
【国际标准分类号】:25_140_20
【页数】:16P;A4
【正文语种】:英语
