确定候选清单物质的浓度，以检查其是否高于0.1% w/w阈值，对于检查是否适用信息传递和通报义务至关重要。
关于物品中物质要求的指南中的表5详细说明和解释了如何确定候选物质清单(按重量(w/w))在一个物品中或包含在一个复杂物体(由一个以上物品组成的任何物体)中的物品的浓度的几种情况。总而言之：
场景一、由候选物质清单制成的物品本身或以混合物制成：浓度计算除以物品的总重量(例如，注塑成型生产的塑料椅子)
场景二、候选物质清单本身或用于连接两个或多个物品(复杂物体)的混合物：候选物质清单的浓度按复杂物体的总重量计算(例如，使用含有该物质的混合物将多个钢管焊接在一起形成的未喷漆自行车框架)。
场景三、候选物质清单涂料中的物质(如油漆、真石漆、清漆、功能性涂料)。
III.A)完全涂布的物品;
III.B)部分涂布件;
III.C)涂层复合物体：候选物质清单在(完全/部分)涂层物品中的浓度计算高于涂层物品或复合物体的总重量
场景四、非常复杂的物体(如沙发、自行车、手机、汽车、飞机等)：上述场景一至三的计算规则适用于每件物品或更简单的复杂物体。
The determination of the concentration of a Candidate List substance,
to check whether it is above the 0.1% w/w threshold or not, is
essential to check whether communication and notification obligations
apply.
Table 5 in the Guidance on requirements for substances in articles
illustrates and explains in detail several scenarios on how to determine
the concentration of a Candidate List substance (weight by weight
(w/w)) in an article or in articles incorporated in a complex object
(any object made up of more than one article). In summary:
Scenario I. Article made from a Candidate List substance as such or
in a mixture: the concentration is calculated over the total weight of
the article (e.g. plastic chair produced by injection moulding)
Scenario II. Candidate List substance as such or in a mixture used
for joining two or more articles (complex object): the concentration of
the Candidate List substance is calculated over the total weight of the
complex object (e.g. unpainted bicycle frame formed by welding together
multiple steel tubes, using a mixture containing the substance)
Scenario III. Candidate List substance in coatings (e.g. paint,
lacquer, varnish, functional coating) - III. A) Fully coated article;
III. B) Partially coated article; III. C) Coated complex object: the
concentration of the Candidate List substance in the (fully/partially)
coated article is calculated over the total weight of the coated article
or of the complex object
Scenario IV. Very complex objects (e.g. sofa, bicycle, mobile
phone, car and aircraft): the calculation rules set out for scenarios I
to III above apply for each article or simpler complex object.
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