Page:NIOSH Manual of Analytical Methods - 5523.pdf/5

 GLYCOLS: METHOD 5523, Issue 1, dated 15 May 1996 - Page 5 of 5 TABLE 2. GLYCOL RECOVERY DATA Desorption Efficiency Spikesa Analyte

a b

b r

LOD (µg/sample)

LOQ (µg/sample )

100 µg (% Recovery)

200 µg (% Recovery)

Ethylene glycol

7

22

93.4

101

0.059

Propylene glycol

6

13

83.4

92.5

0.064

1,3-Butylene glycol

6

12

98.8

102

0.072

Diethylene glycol

16

48

94.6

114

0.041

Triethylene glycol

14

42

85.3

98.7

0.043

Tetraethylene glycol

14

42

111

141

0.092

n = 6 for each spiking level Pooled Relative Standard Deviation

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition