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1 ppm
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1 ppm
1 ppm

résolution: 1 ppm
resolution 1 ppm

1 ppm c, ≤
1 ppm c, ≤

que signifie 1 ppm?
what is the meaning of 1 ppm?

1 ppm c, ≤
1 ppm c, ≤

pnmcomp(1), ppm(5)
ppmtotga(1), pnmcomp(1), ppm(5)

1 ppm = 26,6 mg/m3
1 ppm = 26.6 mg/m3

+/- 1 ppm plus de 60 mm dsv
+/- 1 ppm more than 60 mm dsv

résolution mesure de co2 1 ppm
co2 measurement resolution 1 ppm

(contamination 1 ppm c1, 400 ppm co2)
(contamination ( 1 ppm c1, ( 400 ppm co2)

(contamination 1 ppm c1 et 400 ppm co2)
(contamination 1 ppm c1, 400 ppm co2)

(contamination <=1 ppm c, <=400 ppm co2)
(contamination <= 1 ppm c, <= 400 ppm co2)

3-3′-4-4′-tétrachloroazobenzène < 1 ppm
3,3',4,4'-tetrachloroazobenzene <1 ppm

dans l’air, 1 ppm = 4,83 mg/m3.
the conversion factor for air is 1 ppm = 4.83 mg/m3.

(contamination 1 ppm c1, 1 ppm co, 400 ppm co2,
(contamination 1 ppm c1, 1 ppm co, 400 ppm co2,

< 1 ppm co, < 400 ppm co2, < 0,1 ppm no);
1 ppm co, 400 ppm co2, 0.1 ppm no);

(contamination &lt;= 1 ppm c1, &lt;= 400 ppm co2)
(contamination &lt;= 1 ppm c1, &lt;= 400 ppm co2)

1 ppm = 1,83 mg d’oxyde d’éthylène/m3.
1 ppm = 1.83 mg ethylene oxide/m3.

- tabac expérimental (grèce, turquie, yougoslavie) : nd - 0, 1 ppm
residues found in tobacco and tobacco products nd - 0.1 ppm