ASTM D7315-17
Standard Test Method for Determination of Turbidity Above 1 Turbidity Unit (TU) in Static Mode

Standard No.

ASTM D7315-17

Release Date

2017

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D7315-17(2023)

Latest

ASTM D7315-17(2023)

Scope

1.1 This test method covers the static determination of turbidity in water. Static refers to a sample that is removed from its source and tested in an isolated instrument. (See Section 4.) 1.2 This test method is applicable to the measurement of turbidities greater than 1.0 turbidity unit (TU). The upper end of the measurement range was left undefined because different technologies described in this test method can cover very different ranges. The round robin study covered the range of 0–4000 turbidity units because instrument verification in this range can typically be covered by standards that can be consistently reproduced. 1.3 Many of the turbidity units and instrument designs covered in this test method are numerically equivalent in calibration when a common calibration standard is applied across those designs listed in Table 1. Measurement of a common calibration standard of a defined value will also produce equivalent results across these technologies. 1.3.1 In this test method calibration standards are often defined in NTU values, but the other assigned turbidity units, such as those in Table 1 are equivalent. For example, a 1 NTU formazin standard is also a 1 FNU, a 1 FAU, a 1 BU, and so forth. 1.4 This test method does not purport to cover all available technologies for high-level turbidity measurement. 1.5 This test method was tested on different natural waters and wastewater, and with standards that will serve as surrogates to samples. It is the user’s responsibility to ensure the validity of this test method for waters of untested matrices. 1.6 Depending on the constituents within a high-level sample, the proposed sample preparation and measurement methods may or may not be applicable. Those samples with the highest particle densities typically prove to be the most difficult to measure. In these cases, and alternative measurement method such as the process monitoring method can be considered. 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. Refer to the MSDSs for all chemicals used in this procedure. 1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM D7315-17 Referenced Document

• ASTM D1129 Standard Terminology Relating to Water
• ASTM D1193 Standard Specification for Reagent Water
• ASTM D2777 Standard Practice for Determination of Precision and Bias of Applicable Methods of Committee D-19 on Water
• ASTM D4411 Standard Guide for Sampling Fluvial Sediment in Motion
• ASTM D5847 Standard Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis
• ASTM D6855 Standard Test Method for Determination of Turbidity Below 5 NTU in Static Mode*， 2023-11-01 Update
• ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• ISO 7027 Water quality - Determination of turbidity

ASTM D7315-17 history

• 2023 ASTM D7315-17(2023) Standard Test Method for Determination of Turbidity Above 1 Turbidity Unit (TU) in Static Mode
• 2017 ASTM D7315-17 Standard Test Method for Determination of Turbidity Above 1 Turbidity Unit (TU) in Static Mode
• 2012 ASTM D7315-12 Standard Test Method for Determination of Turbidity Above 1 Turbidity Unit (TU) in Static Mode
• 2007 ASTM D7315-07a Standard Test Method for Determination of Turbidity Above 1 Turbidity Unit (TU) in Static Mode
• 2007 ASTM D7315-07 Standard Test Method for Determination of Turbidity Above 1 Turbidity Unit (TU) in Static Mode