Standard Practice for Ultrasonic Extraction of Lead from Composited Wipe Samples

Importancia y uso:

5.1 This practice is for use in the preparation of no more than four wipe samples collected from equally-sized areas in the same space combined to form a composited sample for subsequent determination of lead content.

5.2 This practice assumes use of wipes that meet Specification E1792 and should not be used unless the wipes meet Specification E1792.

5.3 This practice is capable of preparing samples for determination of lead bound within paint dust (5).

5.4 This practice may not be capable of preparing samples for determination of lead bound within silica or silicate matrices, or within matrices not soluble in nitric acid.

5.5 Adjustment of the nitric acid concentration or acid strength, or both, of the final extract solution may be necessary for compatibility with the instrumental analysis method to be used for lead quantification.

5.6 This sample preparation practice has not been validated for use and must be validated by the user prior to using the practice for client samples. Each combination of wipes (two wipes, three wipes, and four wipes) constitutes a different matrix and must be separately validated.

Subcomité:

D22.12

Referida por:

D8568-24, E1728_E1728M-24, E3203-24A, E1583-25, E3193-23

Volúmen:

11.07

Número ICS:

13.040.99 (Other standards related to air quality), 71.040.50 (Physicochemical methods of analysis)

Palabras clave:

lead; sample preparation; settled dust; ultrasonic extraction; wipe sample;