Page:NIOSH Manual of Analytical Methods - 1500.pdf/7

 HYD RO CAR BO NS, BP 36-216 °C : MET HO D 150 0, Issue 3, dated 15 M arch 200 3 -Page 7 of 8 TABLE 3. SAMPLING FLOWRATE a, VOLUM E, CAPACITY, RANGE, OVE RALL BIAS AND PRECISION [3, 4, 8] Sam pling Flow rate

Rang e of

Volume (L) b

Substance

(L/min)

MIN

MAX

cyclohexane cyclohexene n-hexane methylcyclohexane n-nonane n-octane n-pentane n-undecane

0.01 - 0.2 0.01 - 0.2 0.01 - 0.2 0.01 - 0.2 0.01 - 0.2 0.01 - 0.2 0.01 -0.2 0.01-0.05

2.5 5 not 4 4 4 4 2

5 7 studied 4 4 4 4 2

Breakthrough Volume Concentration Vol (m g/m 3) (L) 7.6 10.4 6.1 5.9 6.1 6.5 3.1

1650 2002 4060 3679 3941 4612 5640

a

Minimum recomm ended flow is 0.01 L/min. Approximately two-thirds the breakthrough volume. c Co rrected va lue ca lculated from data in Re f. 3 b

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition

Overall

Generated Samples

Bias

Precision

Accuracy

(m g/m 3)

(%)

(ÖrT)

(%)

510-2010 510-2030 968-4060 877-3679 940-3941 1050-4403 1476-6190

1.1 10.6 -6.5 -1.8 6.1 -2.0 -8.4

0.060c 0.073 0.056 0.062 0.052 0.060 0.055

±11 .5 ±20 .7 ±15 .0 ±12 .5 ±15 .2 ±12 .1 ±16 .6