Page:NIOSH Manual of Analytical Methods - 9201.pdf/7

CHLORINATED AND ORGANONITROGEN HERBICIDES (PATCH): METHOD 9201, Issue 1, dated 15 January 1998 - Page 7 of 11

TABLE 3. APPLICABLE WORKING RANGE AND ESTIMATED LOD Storage Stability Applicable working range

LOD(1)

r1

Day 1 (2)

Day 30 (3)

Day 120 (3)

% Recovery

% Recovery

% Recovery

Compound

(µg/mL)

(µg/sample)

1

Alachlor

0.0075 - 0.25

0.30 - 10

0.0025

0.1

0.0247

90.8

103.9

97.5

2

Atrazine

0.0525 - 50

2.10 - 200

0.0175

0.7

0.0267

101.8

92.5

95.6

3

Cyanazine

0.0098 - 0.25

0.39 - 10

0.0025

0.1

0.0789

112.0

97.1

101

4

2,4-D acid

0.0075 - 0.25

0.30 - 10

0.0025

0.1

0.0453

75.1

97.3

79.5

5

2,4-D, BE

0.035 - 0.25

1.40 - 10

0.0025

0.1

0.0424

88.0

113.8

97.6

6

2,4-D, EH

0.0085 - 0.25

0.34 - 10

0.0025

0.1

0.0354

92.8

104.2

95.4

7

Metolachlor

0.0075 - 0.25

0.30 - 10

0.0025

0.1

0.0254

107.8

95.6

86.1

8

Simazine

0.0525 - 50

0.33 - 200

0.0175

0.7

0.0189

100.3

93.9

95.7

(µg/mL) (µg/sample)

(1) Limit of Detection

(2) Based on mass of analyte spiked (3) Based on Day 1 results

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition