Page:NIOSH Manual of Analytical Methods - 5022.pdf/5

 ARSENIC, organo-: METHOD 5022, Issue 2, dated 15 August 1994 - Page 5 of 6 TABLE 1. SENSITIVITY, DETECTION LIMIT AND WORKING RANGE DATA FOR ANALYSIS OF PARTICULATE ARSENICALS [1].

Arsenical Dimethylarsenic acid Arsenic (III) Methylarsonic acid p-Aminophenylarsonic acid Arsenic (V)

Sensitivity (ng/mL/1% Abs)

Detection Limit (as As) 300 L Sample Volume Solution (µg/m 3) ng/mL

Range 1 300 L Measurement Sample Volume Solution Precision (µg/m 3) ng/mL (% Sr)

1.3 2.1

0.62 0.71

7 8

1.7 - 6.7 1.7 - 6.7

20 - 80 20 - 80

11.2 - 1.6 11.2 - 1.3

2.1

0.72

9

1.7 - 6.7

20 - 80

8.1 - 4.4

6.3 13.0

0.64 0.46

8 6

1.7 - 6.7 1.7 - 6.7

20 - 80 20 - 80

6.0 - 3.0 10.8 - 1.0

1

The upper limit of the range can be increased by using higher concentration standards which are injected via loops of smaller volume. Although not tested with air samples, the useful range can be extended from 5 µg/m 3 down to 1.7 µg/m 3 based upon the measurement range.

FIGURE 1. IC/AAS Analytical System. NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94