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ISO 21501-2-2019 粒径分布测定--单粒子光相互作用法--第2部分:光散射式液体载体粒子计数器 Determination of particle size distribution — Single particle light interaction methods — Part 2: Light scattering liquid-borne particle counter
This document describes a calibration and verification method for a light scattering liquid-borne <br />particle counter (LSLPC), which is used to measure the size and particle number concentration of <br />particles suspended in liquid. The light scattering method described in this document is based on single <br />particle measurements. The typical size range of particles measured by this method is between 0,1 µm <br />and 10 µm in particle size.<br />The method is applicable to instruments used for the evaluation of the cleanliness of pure water and <br />chemicals, as well as the measurement of number and size distribution of particles in various liquids. <br />The measured particle size using the LSLPC depends on the refractive index of particles and medium; <br />therefore, the measured particle size is equivalent to the calibration particles in pure water.<br />The following are within the scope of this document:<br />— size setting error;<br />— counting efficiency;<br />— size resolution;<br />— false count;<br />— maximum particle number concentration;<br />— sampling flow rate error;<br />— sampling time error;<br />— sampling volume error;<br />— calibration interval;<br />— reporting results from test and calibration....
2023-11-02 13:00:01浏览:11
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ISO 8600-5-2020 光学和光子学--医用内窥镜和内窥镜治疗设备--第5部分:光学刚性内窥镜光学分辨率的测定 Optics and photonics — Medical endoscopes and endotherapy devices — Part 5: Determination of optical resolution of rigid endoscopes with optics
This document applies to rigid endoscopes designed for use in the practice of medicine. Endoscopes <br />having a fibre-optic or opto-electronic imaging system are excluded. It specifies a test method for <br />determining the optical resolution of endoscopes.<br />This document provides a measurement method for characterizing three aspects of the optical <br />resolution of a rigid endoscope. Characteristic A is used to provide a simple measurement of the limiting <br />resolution of the endoscope image. Characteristic B provides a measurement of low spatial frequency <br />resolution and characterizes the sharpness, or contrast, of the endoscope image. Characteristic C <br />provides a measurement of the spatial frequency response of the endoscope image....
2023-10-31 13:36:01浏览:17
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NF V03-925-2016 油籽饼。二乙基氧化物提取物的测定。 Oilseed meals - Determination of oil content - Rapid extraction method
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2023-10-31 06:00:01浏览:11
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NF G62-028-2020 Footwear - Determination of coefficient of friction for footwear and sole components - Test method
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2023-10-31 02:00:01浏览:12
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ISO 11125-2-2018 涂料和有关产品使用前钢衬底的制备--金属喷砂清理磨料的试验方法--第2部分:粒度分布的测定 Preparation of steel substrates before application of paints and related products — Test methods for metallic blast-cleaning abrasives — Part 2: Determination of particle size dist
This document specifies a test method for the determination of particle size distribution of metallic <br />blast-cleaning abrasives by sieving.<br />This is one of a number of parts of ISO 11125 dealing with the sampling and testing of metallic abrasives <br />for blast-cleaning.<br />The types of metallic abrasive and requirements on each are contained in the various parts of ISO 11124.<br />The ISO 11124 and ISO 11125 series have been drafted as a coherent set of International Standards on <br />metallic blast-cleaning abrasives. Information on all parts of both series is given in Annex A....
2023-10-30 23:36:01浏览:10
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ISO 21263-2017 缓释肥料--营养物质释放的测定--包覆肥料的方法 Slow-release fertilizers — Determination of the release of the nutrients — Method for coated fertilizers
This document specifies a method for the determination of the slow release properties of nutrients from coated fertilizers. pH-dependent hydrolysis and degradation by biological or microbial mechanisms are excluded.<br />The specified method is only applicable to products releasing any nutrients by means of a non-biological process (i.e. those where the nutrients are released by a physical mechanism). Microbial attack on the coating (e.g. sulfur coated fertilizers) and the consequences thereof are not measurable by the technique described.<br />This method involves a lengthy process which may not be appropriate for day to day testing purposes. Accelerated methods can be used provided they are correlated with this document. An example of such an accelerated method is described in Annex B. Regression analysis can also be used for this purpose....
2023-10-30 23:12:01浏览:11
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ISO 21766-2018 烟草和烟草制品--烟草制品中烟草专用亚硝胺的测定--LC-MS/MS法 Tobacco and tobacco products — Determination of tobacco-specific nitrosamines in tobacco products — Method using LC-MS/MS
This document specifies a method for the quantification of four tobacco specific nitrosamines (TSNAs) in tobacco and the following tobacco products: cigarettes, cigars and smokeless tobacco products using reversed phase high performance liquid chromatography with tandem mass spectrometry (LC-MS/ MS). The TSNAs determined with this method are: N-nitrosonornicotine (NNN), N-nitrosoanatabine (NAT), N-nitrosoanabasine (NAB) and 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK)....
2023-10-30 21:24:01浏览:12
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NF G06-029-2017 纤维试验。羊毛中碱含量的测定 Wool - determination of alkali content
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2023-10-30 18:36:02浏览:11
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JIS M8242-2018 锰矿石--铜含量的测定方法 Manganese ores -- Method for determination of copper content
この規格は,マンガン鉱石中の銅定量方法について規定する。...
2023-10-30 17:12:02浏览:12
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ISO 5659-2-2017 塑料--烟雾产生--第2部分:单室试验法测定光密度 Plastics -- Smoke generation -- Part 2: Determination of optical density by a single-chamber test
This document specifies a method of measuring smoke production from the exposed surface of <br />specimens of materials or composites. It is applicable to specimens that have an essentially flat surface and do not exceed 25 mm in thickness when placed in a horizontal orientation and subjected to specified levels of thermal irradiance in a closed cabinet with or without the application of a pilot flame. This method of test is applicable to all plastics.<br />It is intended that the values of optical density determined by this test be taken as specific to the specimen or assembly material in the form and thickness tested and are not to be considered inherent, fundamental properties.<br />The test is intended primarily for use in research and development and fire safety engineering in buildings, trains, ships, etc. and not as a basis for ratings for building codes or other purposes. No basis is provided for predicting the density of smoke that can be generated by the materials upon exposure to heat and flame under other (actual) exposure conditions. This test procedure excludes the effect of irritants on the eye.<br />NOTE This test procedure addresses the loss of visibility due to smoke density, which generally is not related to irritancy potency (see Annex E).<br />It is emphasized that smoke production from a material varies according to the irradiance level to which the specimen is exposed. The results yielded from the method specified in this document are based on exposure to the specific irradiance levels of 25 kW/m<sup>2</sup> and 50 kW/m <sup>2</sup> ....
2023-10-30 07:36:03浏览:10
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