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Standard Test Method for On-line Determination of Sodium in Water
Automaticky přeložený název:
Standardní zkušební metoda pro On-line Stanovení sodného ve vodě
NORMA vydána dne 1.1.2013
Označení normy: ASTM D2791-13
Poznámka: NEPLATNÁ
Datum vydání normy: 1.1.2013
Kód zboží: NS-21490
Počet stran: 7
Přibližná hmotnost: 21 g (0.05 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
on-line measurement, ion-selective electrode, specific ion, ICS Number Code 13.060.50 (Examination of water for chemical substances)
Significance and Use | ||||||||||||||||
4.1 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. 4.2 This test method is more sensitive and selective than conductivity measurements on high purity samples. |
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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 (1-3).2 It is generally applicable over the range of 0.01 to 10 000 μg/L. 1.3 The analyst should be aware that adequate collaborative data for precision and bias statements as required by Practice D2777 are not provided. See Section 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. 1.5 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.
Standard Practice for Flow Control and
Temperature Control for On-Line Water Sampling and Analysis Standard Practice for Sampling Steam
(Includes all amendments and changes 12/31/2018). Standard Guide for On-Line Monitoring
Systems for Water Analysis Standard Test Methods for pH of Water Standard Specification for Reagent
Water Standard Terminology Relating to Water
(Includes all amendments and changes 2/14/2024). Standard Practices for Sampling Water
from Flowing Process Streams Standard Practice for Determination of
Precision and Bias of Applicable Test Methods of Committee D19 on
Water |
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