Standard Practice for Handling of High Purity Water Samples

Importancia y uso:

4.1 The determination of trace impurities (on the order of parts per billion) in high purity water places extreme requirements on all aspects of the analytical system. This is particularly true when ubiquitous species such as sodium and chloride are of interest because they can potentially be introduced as contaminants at almost every step of an analytical procedure. Contamination can occur during sample collection, during sample storage by leaching of improperly cleaned containers, during sample transfer, and by handling with pipets, syringes, etc., and during the actual analysis by contaminated reagents and sample cells and loop systems. It is also possible that trace contaminants can be lost from samples by volatilization or precipitation, by diffusion into the matrix of the container material, and by “plating out” on the walls of sampling lines by flow phenomena.

4.2 Strict adherence to a given procedure is necessary to achieve good results at trace levels of analysis because very small differences in procedure execution will affect precision and the addition or loss of nanogram amounts of analyte may affect the accuracy of a determination.

Subcomité:

D19.03

Referida por:

D5196-06R18, D4517-15R23, D6071-14R22, D5463-18, D5996-16, D5173-15R23, D5128-14R22, D5464-16, D5128-14R22, D5542-16, D4517-15R23, D6502-10R22, D4691-17, D5464-16, D5127-13R18, D8361-20, D5086-20, D4691-17, D4309-18, D3370-18, D5173-15R23, D1193-06R18, D1193-06R18, D3370-18, D1193-06R18, D1193-06R18, D5542-16, D1193-06R18, D5542-16

Volúmen:

11.01

Número ICS:

13.060.30 (Sewage water)

Palabras clave:

analysis; container; contamination; ion; sampling;