NITROGLYCERIN
(CH2ONO2)2CHONO2
MW: 227.09
METHOD: 2507, Issue 2
CAS: 55-63-0
EVALUATION:
OSHA : C 0.2 ppm (skin) NIOSH: STEL 0.1 mg/m 3 (skin) ACGIH: 0.05 ppm (skin) (1 ppm = 9.29 mg/m 3 @ NTP)
2507
RTECS: QX2100000
FULL
PROPERTIES:
Issue 1: 15 February 1984 Issue 2: 15 August 1994
liquid; MP 3 to 13 °C; d 1.592 g/mL @ 25 °C; VP 0.034 Pa (0.00026 mm Hg; 0.34 ppm) @ 20 °C
SYNONYMS: NG; 1,2,3-propanetriol trinitrate.
SAMPLING SAMPLER:
SOLID SAMPLER TUBE (Tenax-GC, 100 mg/50 mg)
FLOW RATE:
0.2 to 1.0 L/min
VOL-MIN: -MAX:
3 L @ 1 mg/m 3 100 L
SHIPMENT:
routine
MEASUREMENT TECHNIQUE:
GAS CHROMATOGRAPHY, ECD
ANALYTE:
nitroglycerin
DESORPTION:
2 mL ethanol; stand 30 min
INJECTION VOLUME:
2 µL
SAMPLE STABILITY:
at least 25 days @ 25 °C [1]
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:
BLANKS:
2 to 10 field blanks per set
CARRIER GAS:
95% argon/methane, 75 mL/min
COLUMN:
glass, 1 m x 4-mm, 2-mm ID 10% OV-17 on 60/80 mesh Gas Chrom Q
CALIBRATION:
solutions of NG in ethanol
RANGE:
3 to 45 µg per sample
ACCURACY RANGE STUDIED:
0.6 to 3.2 mg/m 3 [2,3] (15-L samples)
BIAS:
-0.02%
ˆ ): 0.104 [2] OVERALL PRECISION (S rT ACCURACY:
160 °C 280 °C 125 °C
ESTIMATED LOD: 0.6 µg per sample PRECISION (Sr):
0.051 [2]
±20.3%
APPLICABILITY: This method is applicable to the simultaneous determination of nitroglycerin and ethylene glycol dinitrate (EGDN). The working range for both compounds is 0.02 to 0.3 ppm ( 0.2 to 3 mg/m 3) for a 15-L air sample, provided that the linear range of the ECD is not exceeded.
INTERFERENCES: A high concentration of 2-hydroxyethyl nitrate (ethylene glycol mononitrate) tails into the EGDN peak but does not prevent a satisfactory determination of EGDN.
OTHER METHODS: This method combines and replaces Methods S216 [2,5] and P&CAM 203 [4].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
