Page:NIOSH Manual of Analytical Methods - 7303.pdf/1

 ELEMENTS by ICP (Hot Block/HCl/HNO3 Digestion) MW: Table 1

7303

CAS: Table 2

METHOD: 7303, Issue 1

RTECS: Table 2

EVALUATION: PARTIAL

OSHA: Table 2 NIOSH: Table 2 ACGIH: Table 2

Issue 1: 15 March 2003

PROPERTIES: Table 1

ELEMENTS: aluminum antimony* arsenic barium beryllium bismuth* boron

cadmium calcium chromium cobalt copper gallium gold

indium iron lead* magnesium manganese molybdenum neodymium

nickel palladium phosphorus platinum potassium selenium sodium

strontium tellurium thallium tin* titanium vanadium yttrium

zinc

SAMPLING SAMPLER:
 * With certain restrictions (see Table 3)

FILTER (0.8-:m, cellulose ester membrane)

FLOW RATE:

1 to 4 L/min

VOL-MIN: -MAX:

Table 1 Table 1

SHIPMENT:

Routine

SAMPLE STABILITY:

Stable

BLANKS:

2 to 10 field blanks per set ACCURACY

MEASUREMENT TECHNIQUE:

INDUCTIVELY COUPLED ARGON PLASMA, ATOMIC EMISSION SPECTROSCOPY

ANALYTE:

See element list above

REAGENTS:

Conc. HCl, 1.25 mL; and conc. HNO3 , 1.25 mL

FINAL SOLUTION:

5% HCl and 5% HNO3, 25 mL

WAVELENGTH:

Element and instrument specific

BACKGROUND CORRECTION:

Spectral wavelength shift

CALIBRATION:

Elements in 5% HCl, 5% HNO3 LOQ to 50,000 :g/sample [1]

RANGE STUDIED:

5,000 to 50,000 :g/sample

RANGE:

BIAS:

Not determined

ESTIMATED LOD: Varies with element; Table 1

OVERALL PRECISION:

Not determined

ACCURACY:

Not determined

PRECISION (Š):

Not evaluated

APPLICABILITY: The working range of this method is up to 100 mg/m3 for each element in a 500-L sample (the minimum range depends on the LOD for each sample; see Table 1). The analysis is not compound specific. Certain elemental compounds are known to be acceptable or unacceptable by this method (see Table 3). For unverified compounds, a test run should be conducted using a known amount of the compound in question to determine acceptability. INTERFERENCES: Interferences are spectral in nature and are accounted for by choosing appropriate wavelengths, applying interelement correction factors, and background correction. OTHER METHODS: Alternative, more sensitive methods exist for some elements by graphite furnace atomic absorption spectroscopy. This method is similar to NIOSH Method 7301, differing only in the use of the hot block for digestion of the sampler.

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition