Page:NIOSH Manual of Analytical Methods - Chapter A.pdf/4

CHEMICAL NAME			METHOD #
FORMULA	Molecular Weight	Chemical Abstracts Service #	RTECS #

Method numbers are the same as those in the 3rd edition. Evaluation (Full, Partial, Unrated, N/A) is assigned as described in Method Classification of these "blue pages". Issue date reflects current version (e.g., August 15, 1994) and previous 3rd edition versions, if any.

OSHA:
NIOSH:
ACGIH:

These exposure limit values are those in effect at the time of printing of the method.

PROPERTIES:

Boiling/melting points, equilibrium vapor pressure, and density help determine the sample aerosol/vapor composition.

SYNONYMS: Common synonyms for the substance. These are all listed alphabetically in the Index of Names and Synonyms ("yellow pages" in this Manual).

SAMPLING

MEASUREMENT

SAMPLER:	Brief description of sampling EQUIPMENT
FLOW RATE:	Acceptable sampling range, L/min
VOL-MIN:	Minimum sample volume (L); corresponds to Limit of Quantitation (LOQ) at OSHA PEL
-MAX:	Maximum sample volume (L) to avoid analyte breakthrough or overloading
BLANKS:	Each set should have at least 2 field blanks, up to 10% of samples, plus 6 or more media blanks in the case of coated sorbents, impinger solutions, or other special samplers.
ACCURACY
Data are for experiments in which known atmospheres of the substance were generated and analyzed according to the method. Target accuracy is less than 25% difference from actual concentration over the range of the method.

TECHNIQUE:	The measurement technique used
ANALYTE:	The chemical species actually measured A summary of the measurement EQUIPMENT, SAMPLE PREPARATION, and MEASUREMENT steps appearing on the second page of the method is given here.
CALIBRATION:	Summary of type of standards used
RANGE:	Range of calibration standards to be used, from LOQ to upper limit of measurement (Note: More concentrated samples may be diluted in most cases to fall within this calibration range.)
ESTIMATED LOD:	Limit of detection (background + 3)
PRECISION ( r):	Experimental precision of spiked samplers

APPLICABILITY: The conditions under which the method is useful, including the working range in mg/m³ (from the LOQ to the maximum sampler loading) for a stated air volume are given here.

INTERFERENCES: Compounds or conditions which are known to interfere in either sampling or measurement are listed.

OTHER METHODS: Methods from the 2nd edition ("P&CAM" and "S" methods) and current methods which are related to this one, as well as similar OSHA and literature methods are keyed to REFERENCES.

Figure 1. Layout of front page of methods

The SPECIAL PRECAUTIONS section gives safe practices to be observed during sampling and measurement. Next are the step-by-step instructions for