Page:NIOSH Manual of Analytical Methods - 2533.pdf/1

 TETRAETHYL LEAD (as Pb)

Pb(C2H5)4

MW: 323.44

METHOD: 2533, Issue 2

CAS: 78-00-2

2533

RTECS: TP4550000

EVALUATION: FULL

OSHA : 0.075 mg/m 3 (as Pb; skin) NIOSH: 0.075 mg/m 3 (as Pb; skin) ACGIH: 0.1 mg/m 3 (as Pb; skin)

Issue 1: 15 August 1987 Issue 2: 15 August 1994

PROPERTIES:

liquid; d = 1.653 g/mL @ 20 °C; BP 200 °C (dec.); MP -130 to -138 °C; VP 27 Pa (0.2 mm Hg; 2.2 g/m 3) @ 20 °C

SYNONYMS: TEL; lead tetraethyl

SAMPLING

MEASUREMENT

SAMPLER:

SOLID SORBENT TUBE (XAD-2 resin, 100 mg/50 mg)

TECHNIQUE:

GAS CHROMATOGRAPHY, PHOTOIONIZATION DETECTOR

FLOW RATE:

0.01 to 1.0 L/min

ANALYTE:

tetraethyl lead

VOL-MIN: -MAX:

30 L 200 L

DESORPTION:

1 mL pentane; stand 30 min

SHIPMENT:

routine

INJECTION VOLUME:

SAMPLE STABILITY:

at least 1 week @ 25 °C [1]

FIELD BLANKS:

2 to 10 field blanks per set

TEMPERATURE-INJECTOR: -MANIFOLD: -PID: -COLUMN: CARRIER GAS: COLUMN:

ACCURACY RANGE STUDIED:

BIAS:

0.045 to 0.20 mg/m 3 (as Pb) (120-L samples) [1] 5.6%

5 µL 185 °C 200 °C 210 °C 75 °C

N 2, 20 mL/min

3 m x 3-mm OD stainless steel packed with 5% Carbowax 20M on 80/100 mesh Chromosorb WHP

CALIBRATION:

standard solutions of tetraethyl lead in pentane

RANGE:

2 to 30 µg (as Pb) per sample

ˆ ): 0.087 [1] OVERALL PRECISION (S rT

ESTIMATED LOD: 0.1 µg (as Pb) per sample [1]

ACCURACY:

PRECISION (Sr):

± 20.9%

0.067 @ 4.3 to 17 µg (as Pb) per sample

APPLICABILITY: The working range is 0.017 tp 0.23 mg/m 3 (as Pb) for a 120-L air sample.

INTERFERENCES: None identified. The chromatographic column or separation conditions may be changed to circumvent interference problems.

OTHER METHODS: This revises Method S383 [2].

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94