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Standard Test Method for Total Mercury in Water
Automaticky přeložený název:
Standardní zkušební metoda pro celkový obsah rtuti ve vodě
NORMA vydána dne 1.9.2012
Označení normy: ASTM D3223-12
Poznámka: NEPLATNÁ
Datum vydání normy: 1.9.2012
Kód zboží: NS-22904
Počet stran: 8
Přibližná hmotnost: 24 g (0.05 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
atomic absorption, cold vapor technique, mercury, total mercury, ICS Number Code 13.060.50 (Examination of water for chemical substances)
Significance and Use | ||||||||||||||||||||||||
5.1 The presence of mercury in industrial discharge, domestic discharge, and potable water is of concern to the public because of its toxicity. Regulations and standards have been established that require the monitoring of mercury in water. This test method provides an analytical procedure to measure total mercury in water. |
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1. Scope | ||||||||||||||||||||||||
1.1 This test method2 covers the determination of total mercury in water in the range from 0.5 to 10.0 μg Hg/L (1).1.1.1 The analyst should recognize that the precision and bias of this standard may be affected by the other constituents in all waters, as tap, industrial, river, and wastewaters. The cold vapor atomic absorption measurement portion of this method is applicable to the analysis of materials other than water (sediments, biological materials, tissues, etc.) if, and only if, an initial procedure for digesting and oxidizing the sample is carried out, ensuring that the mercury in the sample is converted to the mercuric ion, and is dissolved in aqueous media 1.2 Both organic and inorganic mercury compounds may be analyzed by this procedure if they are first converted to mercuric ions. Using potassium persulfate and potassium permanganate as oxidants, and a digestion temperature of 95°C, approximately 100 % recovery of organomercury compounds can be obtained 1.3 The range of the test method may be changed by instrument or recorder expansion or both, and by using a larger volume of sample. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 A method for the disposal of mercury-containing wastes is also presented (Appendix X1) (5). 1.6 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 Specification for Reagent
Water Standard Practice for Examination of
Water-Formed Deposits by Chemical Microscopy Standard Test Methods for Chemical Oxygen
Demand (Dichromate Oxygen Demand) of Water Standard Test Methods for Ammonia
Nitrogen In Water (Includes all amendments and changes
12/22/2021). Standard Practices for Sampling Water
from Flowing Process Streams Standard Test Methods for Chloride Ion In
Water Standard Practice for Estimation of
Holding Time for Water Samples Containing Organic and Inorganic
Constituents Standard Practice for Writing Quality
Control Specifications for Standard Test Methods for Water
Analysis Standard Terminology Relating to Water
(Includes all amendments and changes 2/14/2024). Standard Practice for Measuring Elements
in Water by Flame Atomic Absorption Spectrophotometry Standard Practice for Determination of
Precision and Bias of Applicable Test Methods of Committee D19 on
Water Standard Guide for Spiking into Aqueous
Samples |
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