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
