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ASTM D 7726 : 2011 : R2016 : EDT 1

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Standard Guide for The Use of Various Turbidimeter Technologies for Measurement of Turbidity in Water
Available format(s)

Hardcopy , PDF

Superseded date

12-11-2023

Language(s)

English

Published date

11-15-2016

CONTAINED IN VOL. 11.01, 2017 Describes the best practices for use of various turbidimeter designs for measurement of turbidity in waters including: drinking water, wastewater, industrial waters and for regulatory and environmental monitoring.

1.1This guide covers the best practices for use of various turbidimeter designs for measurement of turbidity in waters including: drinking water, wastewater, industrial waters, and for regulatory and environmental monitoring. This guide covers both continuous and static measurements.

1.1.1In principle there are three basic applications for on-line measurement set ups. The first is the bypass or slipstream technique; a portion of sample is transported from the process or sample stream and to the turbidimeter for analysis. It is then either transported back to the sample stream or to waste. The second is the in-line measurement; the sensor is submerged directly into the sample or process stream, which is typically contained in a pipe. The third is in-situ where the sensor is directly inserted into the sample stream. The in-situ principle is intended for the monitoring of water during any step within a processing train, including immediately before or after the process itself.

1.1.2Static covers both benchtop and portable designs for the measurement of water samples that are captured into a cell and then measured.

1.2Depending on the monitoring goals and desired data requirements, certain technologies will deliver more desirable results for a given application. This guide will help the user align a technology to a given application with respect to best practices for data collection.

1.3Some designs are applicable for either a lower or upper measurement range. This guide will help provide guidance to the best-suited technologies based given range of turbidity.

1.4Modern electronic turbidimeters are comprised of many parts that can cause them to produce different results on samples. The wavelength of incident light used, detector type, detector angle, number of detectors (and angles), and optical pathlength are all design criteria that may be different among instruments. When these sensors are all calibrated with the sample turbidity standards, they will all read the standards the same. However, samples comprise of completely different matrices and may measure quite differently among these different technologies.

1.4.1This guide does not provide calibration information but rather will defer the user to the appropriate ASTM turbidity method and its calibration protocols. When calibrated on traceable primary turbidity standards, the assigned turbidity units such as those used in Table 1 are equivalent. For example, a 1 NTU formazin standard is also equivalent in measurement magnitude to a 1 FNU, a 1 FAU, and a 1 BU standard and so forth.

1.4.2Improved traceability beyond the scope of this guide may be practiced and would include the listing of the make and model number of the instrument used to determine the turbidity values.

1.5This guide does not purport to cover all available technologies for high-level turbidity measurement.

1.6The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.7This 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.

1.8This guide 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. Refer to the MSDSs for all chemicals used in this procedure.

Committee
D 19
DocumentType
Guide
Pages
18
ProductNote
Reconfirmed EDT 1
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

ASTM D 5091 : 2023 Standard Guide for Water Analysis for Electrodialysis/Electrodialysis Reversal Applications
ASTM D 5131 : 2023 Standard Guide for Record Keeping for Electrodialysis/Electrodialysis Reversal Systems
ASTM D 8002 : 2015 : EDT 1 Standard Test Method for Modified Fouling Index (MFI-0.45) of Water (Withdrawn 2024)
ASTM D 5978/D5978M : 2016 Standard Guide for Maintenance and Rehabilitation of Groundwater Monitoring Wells

ASTM D 6698 : 2014 : REDLINE Standard Test Method for On-Line Measurement of Turbidity Below 5 NTU in Water
ASTM D 1129 : 2013 : REDLINE Standard Terminology Relating to Water
ASTM D 1129 : 2003 Standard Terminology Relating to Water
ASTM D 6698 : 2007 Standard Test Method for On-Line Measurement of Turbidity Below 5 NTU in Water
ASTM D 7315 : 2017 Standard Test Method for Determination of Turbidity Above 1 Turbidity Unit (TU) in Static Mode
ASTM D 1129 : 2013 Standard Terminology Relating to Water
ASTM D 1129 : 2013 : R2020 Standard Terminology Relating to Water
ASTM D 7315 : 2007 : REV A Standard Test Method for Determination of Turbidity Above 1 Turbidity Unit (TU) in Static Mode
ASTM D 6698 : 2012 Standard Test Method for On-Line Measurement of Turbidity Below 5 NTU in Water
ASTM D 1129 : 2006 Standard Terminology Relating to Water
ASTM D 6698 : 2001 Standard Test Method for On-Line Measurement of Turbidity Below 5 NTU in Water
ASTM D 1129 : 2013 : R2020 : EDT 1 Standard Terminology Relating to Water
ASTM D 1129 : 1999 : REV A Standard Terminology Relating to Water
ASTM D 1129 : 2006 : REV A Standard Terminology Relating to Water
ASTM D 1129 : 2003 : REV A Standard Terminology Relating to Water
ASTM D 1129 : 2002 Standard Terminology Relating to Water
ASTM D 7315 : 2017 : R2023 Standard Test Method for Determination of Turbidity Above 1 Turbidity Unit (TU) in Static Mode
ASTM D 7315 : 2012 Standard Test Method for Determination of Turbidity Above 1 Turbidity Unit (TU) in Static Mode
ASTM D 3977 : 1997 : R2013 Standard Test Methods for Determining Sediment Concentration in Water Samples
ASTM D 7315 : 2017 : REDLINE Standard Test Method for Determination of Turbidity Above 1 Turbidity Unit (TU) in Static Mode
ASTM D 6855 : 2003 Standard Test Method for Determination of Turbidity Below 5 NTU in Static Mode
ASTM D 3977 : 1997 : R2002 Standard Test Methods for Determining Sediment Concentration in Water Samples
ASTM D 6855 : 2010 Standard Test Method for Determination of Turbidity Below 5 NTU in Static Mode
ASTM D 3977 : 1997 Standard Test Methods for Determining Sediment Concentration in Water Samples
ASTM D 1129 : 2004 Standard Terminology Relating to Water
ASTM D 6698 : 2014 Standard Test Method for On-Line Measurement of Turbidity Below 5 NTU in Water (Withdrawn 2023)
ASTM D 3977 : 1997 : R2019 Standard Test Methods for Determining Sediment Concentration in Water Samples
ASTM D 1129 : 2002 : REV A Standard Terminology Relating to Water
ASTM D 3977 : 1997 : R2007 Standard Test Methods for Determining Sediment Concentration in Water Samples
ASTM D 6855 : 2017 Standard Test Method for Determination of Turbidity Below 5 NTU in Static Mode
ASTM D 1129 : 2010 Standard Terminology Relating to Water
ASTM D 6855 : 2012 Standard Test Method for Determination of Turbidity Below 5 NTU in Static Mode
ASTM D 1129 : 2006 : REV A : EDT 1 Standard Terminology Relating to Water
ASTM D 1129 : 2001 Standard Terminology Relating to Water
ASTM D 1129 : 2004 : EDT 1 Standard Terminology Relating to Water
ASTM D 6855 : 2017 : R2023 Standard Test Method for Determination of Turbidity Below 5 NTU in Static Mode
ASTM D 3977 : 1997 : R2013 : EDT 1 Standard Test Methods for Determining Sediment Concentration in Water Samples
ASTM D 7315 : 2007 Standard Test Method for Determination of Turbidity Above 1 Turbidity Unit (TU) in Static Mode

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