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Standard Test Methods for Chromium in Water
Automaticky přeložený název:
Standardní zkušební metody pro Chromium ve vodě
NORMA vydána dne 1.9.2012
Označení normy: ASTM D1687-12
Poznámka: NEPLATNÁ
Datum vydání normy: 1.9.2012
Kód zboží: NS-18076
Počet stran: 8
Přibližná hmotnost: 24 g (0.05 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
atomic absorption, chromium, graphite furnace, hexavalent chromium, photometric, water, ICS Number Code 13.060.50 (Examination of water for chemical substances)
Significance and Use | ||||||||||||||||||||||||||||||||||||||||||||||||||||
4.1 Hexavalent chromium salts are used extensively in metal finishing and plating applications, in anodizing aluminum, and in the manufacture of paints, dyes, explosives, and ceramics. Trivalent chromium salts are used as mordants in textile dyeing, in the ceramic and glass industry, in the leather industry as a tanning agent, and in photography. Chromium may be present in wastewater from these industries and may also be discharged from chromate-treated cooling waters. 4.2 The hexavalent state of chromium is toxic to humans, animals, and aquatic life. It can produce lung tumors when inhaled and readily induces skin sensitization. |
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1. Scope | ||||||||||||||||||||||||||||||||||||||||||||||||||||
1.1 These test methods cover the
determination of hexavalent and total chromium in water. Three test
methods are included as follows:
1.2 Test Method A is a photometric method that measures dissolved hexavalent chromium only. Test Methods B and C are atomic absorption methods that are generally applicable to the determination of dissolved or total recoverable chromium in water without regard to valence state. 1.3 Test Method A has been used successfully with reagent grade water Types I, II, and III, tap water, 10 % NaCl solution, treated water from a synthetic organic industrial plant that meets National Pollution Discharge Elimination System (NPDES) permit requirements, and EPA-extraction procedure leachate water, process water, lake water, effluent treatment, that is, lime neutralization and precipitation of spent pickle liquor and associated rinse water from stainless steel pickling. Test Method C has been used successfully with reagent water, stock scrubber water, lake water, filtered tap water, river water, well water, production plant water, and a condensate from a medium BTU coal gasification process. Matrices used, except for reagent water, are not available for Test Method B. It is the user's responsibility to ensure the validity of these test methods for waters of untested matrices. 1.4 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. 1.5 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.
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from Flowing Process Streams Standard Specification for Reagent
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(Withdrawn 2024) Standard Test Methods for Nickel in Water
(Includes all amendments and changes 12/22/2021). Standard Test Methods for Zinc in
Water Standard Practice for Analysis of Metals,
Ores, and Related Materials by Spectrophotometry (Includes all
amendments and changes 6/29/2022). Standard Practice for Writing Quality
Control Specifications for Standard Test Methods for Water
Analysis Standard Practice for Estimation of
Holding Time for Water Samples Containing Organic and Inorganic
Constituents Standard Test Methods for Cobalt in
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Water Standard Guide for Spiking into Aqueous
Samples Standard Practice for Determination of
Precision and Bias of Applicable Test Methods of Committee D19 on
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(Includes all amendments and changes 12/31/2018). Standard Test Methods for Manganese in
Water Standard Practice for Measuring Trace
Elements in Water by Graphite Furnace Atomic Absorption
Spectrophotometry Standard Practice for Measuring Elements
in Water by Flame Atomic Absorption Spectrophotometry Standard Practice for Describing and
Measuring Performance of Ultraviolet and Visible
Spectrophotometers Standard Terminology Relating to Water
(Includes all amendments and changes 2/14/2024). |
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