ASTM-D2791:2007 Edition(Redline)

$26.65

D2791-07 Standard Test Method for On-line Determination of Sodium in Water (Redline)

Published By	Publication Date	Number of Pages
ASTM	2007	12

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Category: ASTM

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Description

Significance and Use

Sodium is a pervasive contaminant and it is the first cation to break through deionization equipment. This test method allows measurement of micrograms per litre (parts per billion) concentrations of sodium in water to monitor low-sodium water sources for indications of contamination or proper operation. Applications include monitoring makeup systems, condensers, condensate polishers, feedwater, boilerwater, and steam.

This test method is more sensitive and selective than conductivity measurements on high purity samples.

1. Scope

1.1 This test method covers the on-line determination of trace amounts of sodium in water using an ion-selective electrode.

1.2 This test method is based on on-line application of the sodium ion electrode as reported in the technical literature (). It is generally applicable over the range of 0.01 to 10 000 g/L.

1.3 The analyst should be aware that adequate collaborative data for precision and bias statements as required by Practice D 2777 are not provided. See Section for details.

1.4 The values stated in SI units are to be regarded as standard. The inch-pound units given in parentheses are for information only.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements see Section 6.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D1066 Practice for Sampling Steam D1129 Terminology Relating to Water D1193 Specification for Reagent Water D1293 Test Methods for pH of Water D2777 Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water D3370 Practices for Sampling Water from Closed Conduits D3864 Guide for Continual On-Line Monitoring Systems for Water Analysis D5540 Practice for Flow Control and Temperature Control for On-Line Water Sampling and Analysis

Keywords

on-line mea

Additional information