Page:NIOSH Manual of Analytical Methods - 2554.pdf/4

 GLY CO L ET HER S: ME TH OD 2554, Issue 1, dated 1 5Ma rch 2003 - Page 4 of 4 mon om ethyl ether acetate was 102.0% (RSD = 1.7). The average 14-day storage stability recovery at approxim ate ly 75x the LOQ for propylene glycol monom ethyl ether was 103.1% (RSD = 2.1), for dipropylene glycol monom ethyl ether was 77.7% (RSD = 2.3), and propylene glycol m onom eth yl ether acetate was 95.4% (RSD = 3.7). Samples containing dipropylene glycol monomethyl ether should be analyzed soon after collection to minimize sample loss during storage.

REFERENCES: [1]

[2]

[3] [4] [5]

OSHA [1993]. Propylene Glycol Monomethyl Ethers/Acetate, Method 99. Organic Methods Evaluation Branch, OSHA A nalytical Methods Manual. Salt Lake City, UT: U.S. Department of Labor, O ccupa tional Safety and He alth Adm inistration, OSH A Salt Lake T echnical Cen ter. OSHA [1993]. Dipropylene Glycol Methyl Ether, Method 101. Organic Methods Evaluation Branch, OSHA Analytical Methods Manual. Salt Lake City, UT: U.S. Department of Labor, Occupational Safety and He alth Adm inistration, OSH A Salt Lake T echnical Cen ter. Pendergrass SM [1998]. Backup data report for glycol ethers. Unpublished report. NIOSH/DPSE. NIOSH [1977]. Docum entation of the NIOSH Validation Tests, S69, U.S. Department of Health, Educa tion, and W elfare; Publ. (NIOSH ) 77-185 (197 7). NIOSH Recom mendations for Occupational Safety and Health, U.S. Department of Health and Hum an Services, (NIO SH) P ubl. 92-100 (Janua ry 1992).

METHOD WRITTEN BY: Stephanie M. Pendergrass, NIOSH/DPSE

TABLE 1.

EXPOSURE LIMITS AND PHYSICAL PROPERTIES

Analyte

OSHA PEL (p pm )

NIOSH REL (p pm )

ACG IH TLV (ppm )

mg/m 3 = 1 ppm @ NTP

Physical Properties

Propylene glycol monom ethyl ether

None

100

100

3.75

Liquid; d 0.9234 g/mL @ 20 °C, BP 120.1 °C, VP 1.6 kPa (12 mm Hg) @ 20°C

Dipropylene glycol monom ethyl ether

100

100

100

6.16

Liquid; d 0.9500 g/mL @ 20 °C, BP 189.6 °C, VP 0.05 kPa (0.5 mm Hg) @ 20°C

Propylene glycol monom ethyl ether ace tate

None

None

None

5.40

Liquid; d 0.9700 g/mL @ 20 °C, BP 145.8 °C, VP 0.5 @ 20°C KPa

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition