Page:NIOSH Manual of Analytical Methods - 5600.pdf/1

 ORGANOPHOSPHORUS PESTICIDES Formula: Table 1

MW: Table 1

METHOD: 5600, Issue 1

CAS: Table 1

RTECS: Table 1

EVALUATION: FULL

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

5600

Issue 1: 15 August 1994

PROPERTIES: Table 3

SYNONYMS: Table 4

SAMPLING SAMPLER:

FILTER/SOLID SORBENT TUBE (OVS-2 tube: 13-mm quartz filter; XAD-2, 270 mg/140 mg)

MEASUREMENT TECHNIQUE: (FPD)

GC, FLAME PHOTOMETRIC DETECTION

FLOW RATE: 0.2 to 1 L/min

ANALYTE:

organophosphorus pesticides, Table 1

VOL-MIN: -MAX:

12 L 240 L; 60 L (Malathion, Ronnel)

EXTRACTION:

2-mL 90% toluene/10% acetone solution

SHIPMENT:

cap both ends of tube

INJECTION VOLUME:

1-2 µL

at least 10 days at 25 °C at least 30 days at 0 °C

TEMPERATURE -INJECTION: -DETECTOR:

SAMPLE STABILITY:

BLANKS:

2 to 10 field blanks per set

ACCURACY

-COLUMN:

240 °C 180 °C to 215 °C (follow manufacturer's recommendation) Table 6

CARRIER GAS:

He at 15 psi (104 kPa)

COLUMN:

fused silica capillary column; Table 6

RANGE STUDIED:

Table 5, Column A

DETECTOR:

FPD (phosphorus mode)

ACCURACY:

Table 5, Column B

CALIBRATION:

standard solutions of organophosphorus compounds in toluene

BIAS:

Table 5, Column C RANGE:

Table 8, Column C

ˆ ): Table 5, Column D OVERALL PRECISION (S rT ESTIMATED LOD: Table 8, Column F PRECISION (Sr): APPLICABILITY: The working ranges are listed in Table 5. They cover a range of 1/10 to 2 times the OSHA PELs. This method also is applicable to STEL measurements using 12-L samples. This method may be applicable to the determination of other organophosphorus compounds after evaluation for desorption efficiency, sample capacity, sample stability, and precision and accuracy.

OTHER METHODS: This method may be used to replace previous organophosphorus pesticide methods. See Table 10 for partial listing. The OVS-2 tube is similar in concept to the device of Hill and Arnold [11], but offers greater convenience and lower flow resistance.

Table 5, Column E

INTERFERENCES: Several organophosphates may co-elute with either target analyte or internal standard causing integration errors. These include other pesticides (see Table 7), and the following: tributyl phosphate (plasticizer), tris-(2-butoxy ethyl) phosphate (plasticizer used in some rubber stoppers), tricresyl phosphate (petroleum oil additive, hydraulic fluid, plasticizer, flame-retardant, and solvent), and triphenyl phosphate (plasticizer and flame-retardant in plastics, lacquers, and roofing paper).

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