Standards World

ISO 23157:2021 pdf free download - Determination of the silanol group content on the surface of fumed silica - - Reaction gas chromatographic method. Fumed silica (pyrogenic silicon dioxide) has a relatively high concentration of silanol groups...

ISO 23190:2021 pdf free download - Traditional Chinese medicine一 Determination of aristolochic acids in natural products by high-performance liquid chromatography (HPLC). Aristolochic acids, a class of chemical compounds with renal toxicity, carcinogenic and mutagenic toxicity, are widely...

ISO 23216:2021 pdf free download - Carbon based films一Determination of optical properties of amorphous carbon films by spectroscopic ellipsometry. This document provides a determination method and a classification for optical properties of amorphous carbon films by spectroscopic...

ISO 23103:2020 pdf free download - Space link extension一Cross support transfer service一Specification framework. 4.1 OVERVIEW This section specifies the procedures defined in this Recommended Standard. Subsection 4.2 specifies behaviors that are generally applicable to all procedures. Subsections...

ISO 23075:2021 pdf free download - Vulcanized rubbers - - Determination of antidegradants by high- performance liquid chromatography. D.1 General An interlaboratory test program (ITP) for precision evaluation for antidegradant content with external calibration was carried out...

ISO 23056:2020 pdf free download - Water reuse in urban areas一 Guidelines for decentralized/ onsite water reuse system一Design principles of a decentralized/ onsite system. With economic development, climate change, rapid urbanization and increases in population, water has...

ISO 23020:2021 pdf free download - Space systems一Determination of test methods to characterize material or component properties required for break-up models used for Earth re- entry. New regulations require unmanned spacecraft and launch vehicle orbital stages, called...

ISO 22955:2021 pdf free download - Acoustics一Acoustic quality of open office spaces. Open-plan offices are increasingly common. They can cause apprehension from users due to noise and the difficulty of performing two theoretically contradictory activities in terms...

ISO 22946:2020 pdf free download - Nuclear criticality safety一Solid waste excluding irradiated and non- irradiated nuclear fuel. Nuclear criticality safety considerations can play a significant role in the production, management, transport and disposal of waste containing fissile...

ISO 22846-2:2012 pdf free download - Personal equipment for protection against falls一Rope access systems一 Part 2: Code of practice. Iso 22846 (all parts) sets out important criteria for the application of rope access systems for industrial purposes....