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
