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Description of ASTM-D6501 2009ASTM D6501 - 09Standard Test Method for Phosphonate in BrinesActive Standard ASTM D6501 | Developed by Subcommittee: D19.05 Book of Standards Volume: 11.01 ASTM D6501Significance and Use This test method is useful for the determination of trace level phosphonate residues in brines. Chemical treatment which contain phosphonates are used as mineral scale and corrosion inhibitors in gas and oil drilling and production operations; and other industrial applications. Often, the decision for treatment is based on the ability to measure low phosphonate concentration and not upon performance criteria. Phosphonate concentrations as low as 0.16 mg/L have been shown effective in carbonate scale treatment. This test method enables the measurement of sub-mg/L phosphonate concentration in brines containing interfering elements. The procedure includes measuring total (see 12.3.8) and free orthophosphate (see 12.4.3) ions and the difference in concentration is the phosphonate concentration. The sample could contain orthophosphate naturally, or from decomposition of the phosphonate during processing or well treatment or from treating compounds containing molecular dehydrated phosphates. 1. Scope 1.1 This test method covers the colorimetric determination of phosphonate (PNA) in brines from gas and oil production operations in the range from 0.1 to 5 mg/L. 1.2 This phosphonate method is intended for use to analyze low concentration of phosphonate in brine containing interfering elements. This test method is most useful for analyzing phosphonate at 0.1 to 1 mg/L range in brines with interfering elements; however, it requires personnel with good analytical skill. 1.3 This test method has been used successfully with reagent water and both field and synthetic brine. It is the user's responsibility to ensure the validity of this test method for waters of untested matrices. 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. For specific hazard statements, see 9.1.3.
ASTM Standards D1129 Terminology Relating to Water D1193 Specification for Reagent Water D2777 Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water D3370 Practices for Sampling Water from Closed Conduits D3856 Guide for Management Systems in Laboratories Engaged in Analysis of Water D4375 Practice for Basic Statistics in Committee D19 on Water D5810 Guide for Spiking into Aqueous Samples D5847 Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis E275 Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers Keywords analysis; brine; colorimetric; phosphonate; scale inhibitor; Brackish water/brines; Colorimetric analysis--water; Orthophosphate conversion; Phosphonate (PNA); Scale inhibitor ; ICS Code ICS Number Code 75.020 (Extraction and processing of petroleum and natural gas) DOI: 10.1520/D6501-09 ASTM International is a member of CrossRef. ASTM D6501The following editions for this book are also available...This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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