ASTM D6209-1998(2012)
环境空气中气态和颗粒多环芳香烃测定的标准试验方法(用气相色谱/质谱分析的背面吸着剂的滤膜的收集)

Standard Test Method for Determination of Gaseous and Particulate Polycyclic Aromatic Hydrocarbons in Ambient Air (Collection on Sorbent-Backed Filters with Gas Chromatographic/Mass Spectrometric Analysis)

 

 

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标准号
ASTM D6209-1998(2012)
发布日期
1998年
实施日期
废止日期
无
中国标准分类号
Z15
国际标准分类号
13.040.20 (Ambient atmospheres)
发布单位
US-ASTM
适用范围
5. Significance and UseTop Bottom

5.1 Polycyclic aromatic hydrocarbons (PAH) as defined by this test method are compounds made up of two or more fused aromatic rings.

5.2 Several PAH are considered to be probable human carcinogens.

5.3 PAH are emitted in the atmosphere primarily through wood or fossil fuel combustion.

5.4 Two- and three-ring PAH are typically present in urban air at concentrations ranging from 10 to several hundred nanograms per cubic metre (ng/m3); those with four or more rings are usually found at concentrations of a few ng/m3 or lower.

5.5 PAH span a broad spectrum of vapor pressures (for example, from 1.1 ?? 10???2 kPa for naphthalene to 2 ?? 10???13 kPa for coronene at 25??C). Table 1 lists some PAH that are frequently found in ambient air. Those with vapor pressures above about 10???8 kPa will be present in the ambient air substantially distributed between the gas and particulate phases. This test method will permit the collection of both phases. However, particulate-phase PAH will tend to be lost from the particulate filter during sampling due to desorption and volatilization.

TABLE 1 Formulae and Physical Properties of Selective PAH

Compound
(Common Name)

Formula

Molecular
Weight

Melting
Point,
??C

Boiling
Point,A
??C

Vapor
Pressure,
kPa at
25??C

Naphthalene

C

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