Page:NIOSH Manual of Analytical Methods - 7030.pdf/1

 ZINC and compounds, as Zn

Zn

MW: 65.37 (Zn); 83.17 (ZnO)

CAS: 7440-66-6 (Zn), 1314-13-2 (ZnO)

METHOD: 7030, Issue 2

7030

RTECS: ZG8600000 (Zn) ZH4810000 (ZnO)

EVALUATION: PARTIAL

OSHA : 5 mg/m3 (ZnO fume & resp. fraction); 10 mg/m3 (ZnO dust) NIOSH: 5 mg/m3 (ZnO); 15 mg/m3/15 min (ZnO dust); STEL 10 mg/m3 (ZnO Fume) ACGIH: 5 mg/m3, STEL 10 mg/m3 (ZnO fume) 10 mg/m3 (ZnO dust)

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

PROPERTIES: metal; valence 2; MP 419 C (Zn)

SYNONYMS: vary depending upon the compound.

SAMPLING SAMPLER:

FILTER (0.8-µm cellulose ester membrane)

MEASUREMENT TECHNIQUE:

ATOMIC ABSORPTION, FLAME

ANALYTE:

zinc

FLOW RATE: 1 to 3 L/min ASHING:

conc. HNO3, 6 mL; 140 °C

VOL-MIN: -MAX:

2 L @ 5 mg/m3 400 L

FINAL SOLUTION:

1% HNO3, 100 mL

SHIPMENT:

routine

FLAME:

air-acetylene, oxidizing

SAMPLE STABILITY:

WAVELENGTH:

213.9 nm

stable

BLANKS:

2 to 10 field blanks per set

BACKGROUND CORRECTION:

D2 or H2 lamp, if needed

CALIBRATION:

Zn2+ in 10% HNO3

RANGE:

10 to 100 µg per sample [1]

ESTIMATED LOD:

3 µg per sample [2]

PRECISION (Sr):

0.03 [1]

ACCURACY RANGE STUDIED:

not studied

BIAS:

not measured

ˆ ): not measured OVERALL PRECISION (S rT ACCURACY:

not determined

APPLICABILITY: The working range is 1 to 10 mg/m3 for a 10-L sample. This is an elemental analysis, not compound specific. Aliquots of the samples can be analyzed separately for many additional metals.

INTERFERENCES: None known.

OTHER METHODS: This method is a revision and replacement of P&CAM 173 for Zinc [1,3]. Method 7300 (plasma emission) is an alternate analytical method. Method 7502 (X-ray diffraction) is specific for ZnO.

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