Page:NIOSH Manual of Analytical Methods - 7013.pdf/1

 ALUMINUM and compounds, as Al

Al

MW:

26.98 (Al); 101.96 (Al203)

CAS: 7429-90-5 (Al); 1344-28-1 (Al203)

METHOD: 7013, Issue 2

RTECS: BD0330000 BD1200000

EVALUATION: PARTIAL

OSHA : no PEL NIOSH: see table 1 ACGIH: see table 1

7013

Issue 1: 15 February 1984 Issue 2: 15 August 1994

PROPERTIES: ductile metal; valence 3; MP 660 °C

SYNONYMS: vary depending upon the compound; alumina (Al 2O 3)

SAMPLING SAMPLER:

FILTER (0.8-µm cellulose ester membrane)

MEASUREMENT TECHNIQUE:

ATOMIC ABSORPTION, FLAME

ANALYTE:

aluminum

FLOW RATE: 1 to 3 L/min ASHING: VOL-MIN: -MAX:

10 L @ 5 mg/m 3 400 L

SHIPMENT:

routine

conc. HNO 3, 6 mL; 140 °C

FINAL SOLUTION:

10% HNO 3, 10 mL 1000 µg/mL Cs

FLAME:

nitrous oxide-acetylene, reducing 309.3 nm

SAMPLE STABILITY:

stable

WAVELENGTH:

BLANKS:

2 to 10 field blanks per set

BACKGROUND CORRECTION: none used CALIBRATION:

Al3+ in 10% HNO 3

RANGE:

50 to 5000 µg per sample [1]

ACCURACY ESTIMATED LOD: 2 µg per sample [2] RANGE STUDIED:

not studied

BIAS:

none identified

ˆ ): OVERALL PRECISION (S rT

not evaluated

ACCURACY:

not evaluated

PRECISION (Sr):

0.03 [1,2]

APPLICABILITY: The working range is 0.5 to 10 mg/m 3 for a 100-L sample. This is an elemental analysis, not compound specific. Verify that the types of compounds in the samples are soluble with this ashing procedure. Aliquots of the samp les can be analyzed separately for approximately four additional metals.

INTERFERENCES: Cesium at 1000 µg/mL controls ionization in the nitrous oxide-acetylene flame [3]. Iron and HCl at greater than 0.2% (w/w) decrease the sensitivity. Vanadium or H 2SO 4 require 1% (w/w) La as a releasing agent [4].

OTHER METHODS: This is Method P&CAM 173 for Al [1] in a revised format. Method 7300 (ICP-AES) is an alternate analytical method.

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