71.040.99 有关分析化学的其他标准 标准查询与下载

ASTM D7144-05a(2011) 随后金属测定用通过微真空取样收集表面灰尘的标准操作规程

Human exposure to toxic metals present in surface dust can result from dermal contact with or ingestion of contaminated dust. Also, inhalation exposure can result from disturbing dust particles from contaminated surfaces. Thus standardized methods for the collection and analysis of metals in surface dust samples are needed in order to evaluate the potential for human exposure to toxic elements. This practice involves the use of sampling equipment to collect surface dust samples that may contain toxic metals, and is intended for use by qualified technical professionals. This practice allows for the subsequent determination of collected metals concentrations on an area (loading) or mass concentration basis, or both. Because particle losses can occur due to collection of dust onto the inner surfaces of the nozzle, the length of the collection nozzle is specified in order that such losses are comparable from one sample to another. This practice is suitable for the collection of surface dust samples from, for example: (a) soft, porous surfaces such as carpet or upholstery; (b) hard, rough surfaces such as concrete or roughened wood; (c) confined areas that cannot be easily sampled by other means (such as wipe sampling as described in Practice D6966). A companion sampling technique that may be used for collection of surface dust from hard, smooth surfaces is wipe sampling (Practice D6966). A companion vacuum sampling technique that may be used for sampling carpets is described in Practice D5438. Procedures presented in this practice are intended to provide a standardized method for dust collection from surfaces that cannot be reliably sampled using wipe collection methods (for example, Practice D6966). Additionally, the procedure described uses equipment that is readily available and in common use for other environmental and occupational hygiene sampling applications. The entire contents of the filter holder, that is, the filter plus collected dust, is targeted for subsequent analysis for metals content. An internal capsule is used if gravimetric analysis is necessary.1.1 This practice covers the micro-vacuum collection of surface dust for subsequent determination of metals. The primary intended application is for sampling from soft, rough, or porous surfaces. 1.2 Micro-vacuum sampling is carried out using a collection nozzle attached to a filter holder (sampling cassette) that is connected to an air sampling pump. 1.3 This practice allows for the subsequent determination of metals on a loading basis (mass of metal(s) per unit area sampled), or on a concentration basis (mass of metal(s) per unit mass of sample collected), or both. 1.4 The values stated in SI units are to be regarded as standard. 1.5 Limitations8212;Due to a number of physical factors inherent in the micro-vacuum sampling method, analytical results for vacuum dust samples are not likely to reflect the total dust contained within the sampling area prior to sample collection. Indeed, dust collection will generally be biased towards smaller, less dense dust particles. Nevertheless, the use of this standard practice will generate data that are consistent and comparable between operators performing micro-vacuum collection at a variety of sampling locations and sites. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is t......

Standard Practice for Collection of Surface Dust by Micro-vacuum Sampling for Subsequent Metals Determination

ISO 22029:2003 光谱数据交换用标准文档格式

This International Standard presents a simple format for the exchange of digital spectral data that has been designated as an EMSA/MAS standard. This format is readable by both humans and computers and is suitable for transmission through various electronic networks (BITNET, ARPANET), the phone system (with modems) or on physical computer storage devices (such as floppy disks). The format is not tied to any one computer, programming language or computer operating system. The adoption of a standard format would enable different laboratories to freely exchange spectral data, and would help to standardize data analysis software. If equipment manufacturers were to support a common format, the microscopy and microanalysis community would avoid duplicated effort in writing data-analysis software.

Standard file format for spectral data exchange

DB37/T 376-2003 复配次氯酸钠消毒液通用技术条件

本标准规定了过氧乙酸溶液中硫酸盐含量的测定方法

General technical specification for compound sodium hypochlorite disinfectant

DB37/T 374-2003 商业零售业态

本标准规定了过氧乙酸含量的测定方法

Commercial retail format

ISO/CD 5820 微束分析 - 超维数据文件规范 (HMSA)

Microbeam Analysis — Hyper-Dimensional Data File Specification (HMSA)