Page:NIOSH Manual of Analytical Methods - 1552.pdf/1

 TERPENES

C10H16

MW: 136.24

METHOD: 1552, Issue 1

1552

CAS: Table 1

RTECS: Table 1

EVALUATION: PARTIAL

OSHA : no PEL NIOSH: no REL ACGIH: no TLV (1 ppm = 5.57 mg/m3 @ NTP)

PROPERTIES:

Issue 1: 15 May 1996

Table 1

NAMES AND SYNONYMS: (1) limonene, d-,l-: cinene (2) -pinene: 2-pinene (3) -pinene: nopinene, pseudopinene (4) 3-carene: isodiprene

SAMPLING SAMPLER:

SOLID SORBENT TUBE (coconut shell charcoal, 100 mg/50 mg)

FLOW RATE:

0.01 to 0.2 L/min

VOL-MIN: -MAX:

2 L @ 100 mg/m3 [1,2] 30 L @ 100 mg/m3 [1,2]

SHIPMENT:

MEASUREMENT TECHNIQUE:

GAS CHROMATOGRAPHY, FID

ANALYTES:

limonene, -pinene, -pinene, 3-carene

DESORPTION:

1 mL CS2, stand 30 min [4]

INJECTION VOLUME:

1 µL

routine

SAMPLE STABILITY:

30 days @ 5 C [3]

BLANKS:

2 to 10 field blanks per set

TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:

250 C 300 C 35 to 135 C @ 10 C/min

CARRIER GAS:

He, 30 mL/min

COLUMN:

Stabilwax, 30 m, 0.53-mm ID, 3-µm film

ACCURACY RANGE STUDIED:

not studied

CALIBRATION:

standard solutions of terpenes in CS2

BIAS:

not determined

RANGE:

2 to 840 µg/sample [1-3]

not determined

ESTIMATED LOD:Table 2

not determined

PRECISION ( r):

OVERALL PRECISION ( ACCURACY:

rT

):

Table 2

APPLICABILITY:The working range is 0.02 to 36 ppm (0.13 to 200 mg/m3) for a 15-L sample. This method may be applicable to other monocyclic and dicyclic terpenes that exhibit acceptable stability on charcoal tubes and in carbon disulfide (desorption solvent).

INTERFERENCES: Other terpenes or compounds with similar retention times may interfere. There is also the possibility of interfering peaks from the decompositional rearrangement of some terpenes from prolonged storage on charcoal or in carbon disulfide [3,4].

OTHER METHODS: This is a new method for the determination of four terpenes. Other researchers have developed methods for individual terpene compounds [1, 2].

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition