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Standard Test Method for Aluminum in Water
Automaticky přeložený název:
Standardní zkušební metoda pro hliník ve vodě
NORMA vydána dne 1.9.2012
Označení normy: ASTM D857-12
Poznámka: NEPLATNÁ
Datum vydání normy: 1.9.2012
Kód zboží: NS-39492
Počet stran: 6
Přibližná hmotnost: 18 g (0.04 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
aluminum, analysis, atomic absorption flame, water, ICS Number Code 13.060.50 (Examination of water for chemical substances)
Significance and Use | ||||||||||||||||||||||||||||||||
5.1 Although there is little information available concerning the toxicological significance of aluminum in man, the American Water Works Association has established a water quality guideline or goal of a maximum of 0.05 mg/L. Under the National Pollution Discharge Elimination System (NPDES), some permits may set aluminum discharge limits. Some evidence does exist to indicate that low levels (5 mg/L) will interfere with activated sludge processes. For the above reasons monitoring of aluminum may be desirable. 5.2 Aluminum is monitored in boiler make-up water, where alum has been used, to determine whether aluminum is present after pretreatment. Residual aluminum may consume ion exchange capacity or consume boiler water treatment chemicals added to stoichiometrically chelate hardness ions (that is, calcium and magnesium) in boiler feed water. 5.3 Aluminum is monitored in cooling water make-up, since its presence may result in deactivation of anionic substances in scale or corrosion inhibitor treatment chemicals, or both. Deactivation may result in decreased performance of inhibitors. |
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1. Scope | ||||||||||||||||||||||||||||||||
1.1 This test method covers the direct flame atomic absorption determination of aluminum in the nitrous oxide-acetylene flame. 1.2 This test method is applicable to waters containing dissolved and total recoverable aluminum in the range from 0.5 to 5.0 mg/L. Aluminum concentrations as high as approximately 50 mg/L can be determined using this test method without dilution. However, no precision and bias data are available for concentrations greater than 5.0 mg/L. 1.3 This test method was tested on reagent, natural, and potable waters. It is the user's responsibility to ensure the validity of this test method for waters of untested matrices. 1.4 The same digestion procedure may be used to determine total recoverable nickel (Test Methods D1886), chromium (Test Methods D1687), cobalt (Test Methods D3558), copper (Test Methods D1688), iron (Test Methods D1068), lead (Test Method D3559), manganese (Test Method D858), and zinc (Test Methods D1691). 1.5 Precision and bias data have been obtained on reagent, natural, and potable waters. It is the responsibility of the user to ensure the validity of this test method on untested matrices. 1.6 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are mathematical conversions and may not be exact equivalents; therefore, each system shall be used independently of the other. 1.7 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.
1.8 Former Test Methods A
(Fluorometric) and B and C (Spectrophotometric) were discontinued.
Refer to
Standard Terminology Relating to Water
(Includes all amendments and changes 2/14/2024). Standard Test Methods for Iron in
Water Standard Test Methods for Copper in
Water Standard Practices for Sampling Water
from Flowing Process Streams Standard Test Methods for Cobalt in
Water Standard Test Methods for Lead in Water
(Withdrawn 2024) Standard Test Methods for Zinc in
Water Standard Test Methods for Chromium in
Water Standard Specification for Reagent
Water Standard Practice for Sampling Steam
(Includes all amendments and changes 12/31/2018). Standard Practice for Determination of
Precision and Bias of Applicable Test Methods of Committee D19 on
Water Standard Practice for Estimation of
Holding Time for Water Samples Containing Organic and Inorganic
Constituents Standard Guide for Spiking into Aqueous
Samples Standard Practice for Writing Quality
Control Specifications for Standard Test Methods for Water
Analysis Standard Test Methods for Nickel in Water
(Includes all amendments and changes 12/22/2021). Standard Test Methods for Manganese in
Water |
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