前言:这是CAN/CSA-Z12901-2《纳米技术——应用于工程纳米材料的职业风险管理第2部分:控制带方法的使用》的第一版，该方法采用了同名ISO（国际标准化组织）技术规范12901-2（第一版，2014-01-15），但存在加拿大的偏差。为简洁起见，本标准通篇称为“CAN/CSA-Z1291-2”。本文件包含修订和附加指南，以反映加拿大的做法和安全考虑。本标准是国际和加拿大对ISO/TC 229（国际标准化组织纳米技术委员会）持续活动的贡献所产生的一系列纳米技术标准之一。范围:ISO/TS 12901本部分的目的是描述使用控制带方法来控制与纳米材料职业接触相关的风险- 即使有关其毒性和定量暴露估计的知识有限或缺乏，物体及其大于100 nm（NOAA）的聚集体和凝聚体。控制带的最终目的是控制接触，以防止对工人健康产生任何可能的不利影响。这里描述的控制带工具是专门为吸入控制设计的。ISO/TS 12901-1中给出了一些皮肤和眼睛保护指南。ISO/TS 12901的这一部分侧重于有意生产的NOAA，其由纳米颗粒、纳米粉末、纳米纤维、纳米管、纳米线等纳米物体以及其聚集体和附聚物组成。在ISO/TS 12901的本部分中，术语“NOAA”适用于此类组件，无论是原始形式的组件，还是包含在材料或制剂中的组件，这些组件在其生命周期内可能会被释放。 然而，与许多其他工业过程一样，纳米技术过程可能会以无意中产生的NOAA的形式产生副产品，这可能与需要解决的健康和安全问题有关。ISO/TS 12901的本部分旨在通过提供一种易于理解、实用的职业暴露控制方法，帮助企业和其他人，包括从事NOAA制造、加工或处理的研究机构。控制带适用于在正常或合理可预测的条件下开发、制造和使用NOAA过程中与职业健康相关的问题，包括维护和清洁操作，但不包括偶然或意外情况。控制带不适用于安全管理、环境或运输领域； 它被认为只是全面风险管理流程的一部分。生物来源的材料不在ISO/TS 12901本部分的范围内。

Preface:This is the first edition of CAN/CSA-Z12901-2,Nanotechnologies — Occupational risk management applied to engineered nanomaterials—Part 2: Use of the control banding approach, which is an adoption, with Canadian deviations, of the identically titled ISO (International Organization for Standardization) Technical Specification 12901-2 (first edition, 2014-01-15).For brevity, this Standard will be referred to as "CAN/CSA-Z12901-2" throughout.This document contains revisions and additional guidance to reflect Canadian practices and safety considerations. This Standard is one of a series of Standards on nanotechnologies resulting from international and Canadian contributions to the continued activity of ISO/TC 229, the ISO Technical Committee on nanotechnologies.Scope:The purpose of this part of ISO/TS 12901 is to describe the use of a control banding approach for controlling the risks associated with occupational exposures to nano-objects, and their aggregates and agglomerates greater than 100 nm (NOAA), even if knowledge regarding their toxicity and quantitative exposure estimations is limited or lacking.The ultimate purpose of control banding is to control exposure in order to prevent any possible adverse effects on workers' health. The control banding tool described here is specifically designed for inhalation control. Some guidance for skin and eye protection is given in ISO/TS 12901-1.This part of ISO/TS 12901 is focused on intentionally produced NOAA that consist of nano-objects such as nanoparticles, nanopowders, nanofibres, nanotubes, nanowires, as well as of aggregates and agglomerates of the same. As used in this part of ISO/TS 12901, the term "NOAA" applies to such components, whether in their original form or incorporated in materials or preparations from which they could be released during their lifecycle. However, as for many other industrial processes, nanotechnological processes can generate by-products in the form of unintentionally produced NOAA which might be linked to health and safety issues that need to be addressed as well.This part of ISO/TS 12901 is intended to help businesses and others, including research organizations engaged in the manufacturing, processing or handling of NOAA, by providing an easy-to-understand, pragmatic approach for the control of occupational exposures.Control banding applies to issues related to occupational health in the development, manufacturing and use of NOAA under normal or reasonably predictable conditions, including maintenance and cleaning operations but excluding incidental or accidental situations.Control banding is not intended to apply to the fields of safety management, environment or transportation; it is considered as only one part of a comprehensive risk management process.Materials of biological origin are outside the scope of this part of ISO/TS 12901.