挥发性有机化合物含量的测定

挥发性有机化合物含量的测定

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With certain exceptions noted below, the solvents used in coatings, inks, adhesives, and

consumer products are classified as volatile organic compounds (VOCs).除了某些例外下文指出，溶剂在涂料，油墨，粘合剂，以及消费类产品被列为挥发性有机物（VOCs）的化合物。Although these products include other VOCs besides solvents, solvents generally account for the largest part of their VOC content.虽然这些产品包括除溶剂等挥发性有机物，溶剂一般占了最大部分的挥发性有机化合物含量。Over the last few years, federal and state agencies have set limits on the amount of VOCs that can be used in many of these products.在过去的几年中，联邦和各州机构的设置可以在这些产品多用于挥发性有机化合物的数额限制。In order to comply with these VOC-content limits, product formulators must understand how the VOC content of a product is determined for regulatory purposes.为了遵守这些挥发性有机化合物含量设定上限，产品配方必须了解该产品的挥发性有机化合物含量为监管目的决定的。

Emissions of VOCs, in and of themselves, do not necessarily give rise to health or environmental concerns.挥发性有机化合物的排放量，其本身并不一定会导致健康或环境问题。In many areas, however, they react with oxides of nitrogen (NOx) to form ground-level ozone -- the primary component of urban "smog."在许多地区，但是，它们与氮氧化物反应（NOx）的形成地面臭氧- 城市“烟雾的主要组成部分。” There are a small number of solvents that do not contribute to ozone formation and are therefore classified as "VOCexempt."有许多溶剂，不利于臭氧的形成，因此为“VOCexempt分类小的数目。” Although only a few solvents are currently classified as VOC-exempt, they can be an important tool for meeting VOC-content limits while still allowing the use of proven solvent systems.虽然只有少数溶剂，目前各挥发性有机化合物豁免分类，他们可以成为会议的挥发性有机化合物含量设定上限，同时仍然允许使用的证明溶剂系统的重要工具。

Consumer Products消费性电子产品

In September 1998, the US Environmental Protection Agency (EPA) established national VOC-content limits for 24 categories of consumer products, including such things as hairsprays, deodorants, air fresheners, and household cleaners. 1998年9月，美国环境保护署（EPA），确定了24消费产品，包括喷发胶，除臭剂，空气清新剂等东西分类的国家挥发性有机化合物含量设定上限，以及家用清洁剂。Although states are allowed to set more stringent limits on consumer products sold within their borders, California is the only state that has done so as of this date.虽然各国都允许在其境内设置销售消费电子产品更严格的限制，加州是唯一的国家有这样做的，作为这个日期。

VOC-content limits for consumer products are typically set in terms of weightpercent VOCs.消费产品挥发性有机化合物含量的限制是通常设置在weightpercent VOCs的条款。Under the federal rule, for example, hairsprays may contain no more than 80 percent VOCs on a weight-percent basis.根据联邦规则，例如，喷发胶可能含有一个重量不超过百分之80的基础上百分之挥发性有机化合物。(The corresponding California limit is 55 percent.) Thus, the ingredients in a hairspray product that are classified as VOCs may not account for more than 80 percent of the weight of the product (or 55 percent for products sold in California). （相应的百分之加州上限为55。）因此，在发胶产品为挥发性有机化合物不得超过百分之八十帐户的产品（或在加州销售的产品百分之55的重量分类的成分）。In order to demonstrate compliance