ISO 16000-25:2011 室内空気 — Part 25: 建築製品による半揮発性有機化合物の排出量の測定 — マイクロチャンバー法 | ページ 6

3.1

air change rate for micro-chamber

n

ratio of the volume of clean air brought into the micro-chamber per hour and the free micro-chamber volume measured in identical units

3.2

air flow rate for micro-chamber

q_{V ,c}

air volume entering into the micro-chamber per time

3.3

air velocity

air speed over the surface of the test specimen

[SOURCE: ISO 16000-9:2006, 3.3]

3.4

area specific air flow rate

q_VA

ratio between the supply air flow rate and the area of the test specimen

[SOURCE: ISO 16000-9:2006, 3.4]

3.5

area specific emission rate for SVOC

q_mA

building product specific rate describing the mass of a substance emitted from an exposed area per time at a given time from the start of the test

Note 1 to entry: For the purposes of this part of ISO 16000, the emission consists of SVOC.

Note 2 to entry: The term “area specific emission rate” is sometimes used in parallel with the term “emission factor”.

3.6

building product

product produced for incorporation in a permanent manner in construction works

[SOURCE: ISO 16000-9:2006, 3.5]

3.7

field blank

m_t0

mass of SVOC in the sorbent tube when all operations except air sampling are performed

Note 1 to entry: Used in order to consider contamination originating from the sorbent tube itself and contamination originating in opening, closing, and transportation.

3.8

inert gas

gas without active chemical or other properties

Note 1 to entry: Normally, helium (He) gas or nitrogen (N₂) is used as the gas for thermal desorption (TD) of SVOC adsorbed in the micro-chamber (see Reference [8]).

3.9

mass collected in control test

m₀

sum of mass during first and second steps of test without introducing specimen

3.10

mass collected in first step

m₁

mass of SVOC sampled and measured at the micro-chamber outlet, which are emitted and not absorbed in the micro-chamber

3.11

mass collected in second step

m₂

mass of SVOC sampled and measured at the micro-chamber outlet when thermal desorption is performed

3.12

micro-chamber

container enabling control of conditions for measurement of SVOC emissions from building materials

Note 1 to entry: Micro-chambers typically range in volume as described in B.1.

3.13

recovery

measured mass of a target semi-volatile organic compound in the air leaving the micro-chamber during thermal desorption (second step) divided by the mass of target semi-volatile organic compound added to the micro-chamber

Note 1 to entry: Recovery is expressed as a percentage.

Note 2 to entry: The recovery provides information about the performance of the entire method.

3.14

sample

part or piece of a building product that is representative of the production

[SOURCE: ISO 16000-9:2006, 3.10]

3.15

sampling period

duration over which a sample is taken

Note 1 to entry: The sampling period is the time during which air is sampled from the outlet of the micro-chamber using sorbent tubes or other devices.

3.16

semi-volatile organic compound

SVOC

organic compound whose boiling point is in the range from (240 °C to 260 °C) to (380 °C to 400 °C)

Note 1 to entry: This classification has been defined by the World Health Organization (Reference [9]).

Note 2 to entry: Boiling points of some compounds are difficult or impossible to determine because they decompose before they boil at atmospheric pressure. Vapour pressure is another criterion for classification of compound volatility that can be used for classification of organic chemicals. SVOCs have vapour pressures between 10⁻² mPa and 10 Pa.

3.17

sorbent tube blank

value of SVOC in the sorbent tube itself before air sampling

3.18

target semi-volatile organic compound

product specific semi-volatile organic compound

3.19

test specimen

part of the sample specially prepared for emission testing in a micro-chamber cell in order to simulate the emission behaviour of the material or product that is tested

3.20

test start

time of placing the test specimen in the micro-chamber

3.21

total mass collected in first and second step

sum of mass collected during first and second steps of test