Designation standards: ASTM D7572-13 Note: WITHDRAWN Publication date standards: 1.6.2013 SKU: NS-38749 The number of pages: 10 Approximate weight : 30 g (0.07 lbs) Country: American technical standard Category:Technical standards ASTM
Keywords: aqueous cyanide, extraction, mine rock, soil, ICS Number Code 73.080 (Non-metalliferrous minerals)
Additional information
Significance and Use
5.1 This guide is intended as a
means for obtaining an extract from mine rock and soil samples to
measure cyanide content in the aqueous portion of the sample on a
dry weight basis. Cyanide is analyzed in mine rock and soil
extracts for measurement of cyanide concentration; however,
improper sample collection and extraction can result in significant
positive or negative bias.
5.2 This guide is designed to
mobilize aqueous cyanides present in the solids, so that the
resulting extract can be used to assess leachate that could
potentially be produced from mine rock or soil.
5.3 This guide is not intended to
simulate actual site leaching conditions.
5.4 This guide produces extracts
that are amenable to the determination of trace cyanides. When
trace cyanides are being determined, it is especially important
that precautions be taken in sample preservation, storage, and
handling to avoid possible contamination of the extracts.
5.5 This guide uses a comparative
test method and is intended for use as a routine method for
monitoring mine rock and soils. It is assumed that all who use this
guide will be trained analysts capable of performing it skillfully
and safely. It is expected that work will be performed in a
properly equipped laboratory applying appropriate quality control
practices such as those described in Guide D3856.
5.6 This guide identifies proper
methods for obtaining mine rock and soil samples for the specific
purpose of measuring cyanide concentrations.
1. Scope
1.1 This guide is applicable for the
collection, extraction, and preservation of extracts from mine rock
and soil samples for the analysis of cyanide in the extracts.
Responsibilities of field sampling personnel and the laboratory are
indicated.
1.2 The sampling, preservation, and
extraction procedures described in this guide are recommended for
the analysis of total cyanide, available cyanide, weak acid
dissociable cyanide, and free cyanide by Test Methods D2036, D4282,
D4374, D6888, D6994, D7237, and D7284. The information supplied in
this guide can also be applied to other analytical methods for
cyanide, for example, US EPA Method 335.4.
1.3 The procedure options methods
appear in the following order:
Procedure Option
Sections
Option A
Laboratory Processing of Field
Preserved Samples
Option B
Laboratory Processing of Moist
Field Samples
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 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 Test Method for Available
Cyanides with Ligand Displacement and Flow Injection Analysis (FIA)
Utilizing Gas Diffusion Separation and Amperometric Detection
Standard Test Method for Total Cyanide by
Segmented Flow Injection Analysis, In-Line Ultraviolet Digestion
and Amperometric Detection (Includes all amendments and changes
7/26/2017).
Standard Practice for Sampling,
Preservation and Mitigating Interferences in Water Samples for
Analysis of Cyanide (Includes all amendments and changes
5/13/2022).
Standard Test Method for Total Cyanide in
Water by Micro Distillation followed by Flow Injection Analysis
with Gas Diffusion Separation and Amperometric Detection
Standard Test Method for Determination of
Metal Cyanide Complexes in Wastewater, Surface Water, Groundwater
and Drinking Water Using Anion Exchange Chromatography with UV
Detection
Standard Test Method for Free Cyanide and
Aquatic Free Cyanide with Flow Injection Analysis (FIA) Utilizing
Gas Diffusion Separation and Amperometric Detection
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