GB/T 23762-2020Test method for water purification performance of photocatalytic materials (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 23762-2009 "Test Method for Purification of Photocatalytic Material Aqueous System". Compared with GB/T 23762-2009, the main technical changes except for editorial changes are as follows.

--- Modified the scope of application of the standard (see Chapter 1, Chapter 1 of the 2009 edition);

--- Deleted the terms "photocatalyst" and "photocatalytic degradation rate" (see 3.2 and 3.6 of the 2009 edition);

--- Modify the test temperature requirements (see 5.1, 9.1 of the 2009 edition);

--- Modified the pollution marker, using phenol instead of methylene blue as a pollution marker (see 5.2, 9.2 in the 2009 edition);

--- Modified the range of visible light irradiance (see 5.3, 9.4 of the 2009 edition);

--- Revised the content of reagents or materials (see Chapter 7, Chapter 7 of the 2009 edition);

--- Modified the detection instrument and used high-performance liquid chromatography to determine the concentration of phenol (see 8.1, 8.1 in the 2009 edition);

--- Modified the power of ultraviolet light source and visible light source (see 8.3, 8.3 of 2009 edition);

--- Modified the name of "Particulate and Thin Film Photocatalytic Reactor" and the size of the catalytic reaction bed frame 8.4.2);

--- Modify the size of "film or sheet samples" (see 9.3, 9.5.3 of 2009 edition);

--- Modified the time of sample pretreatment, and increased the requirement of sample preservation time (see 10.1, 9.6 of 2009 edition);

--- Modify the standard curve drawing steps (see 10.2, 2009 version 10.1);

--- Revised the speed of centrifugal separation (see 10.4.1 and 10.5.1, 2009 version 10.3.1 and 10.4.1);

--- Increased the provisions of the visible light source irradiation time (see 10.5.1 and 10.5.2);

--- Modified the measurement procedure of photocatalytic stability (see 10.6, 2009 version 10.5);

--- Modified the unit of photocatalytic degradation (see 11.1, 11.1 in 2009 edition).

1 Scope

This standard specifies the principles, test conditions, general provisions, reagents or materials, and instruments of the test method for the purification performance of aqueous solutions of photocatalytic materials Equipment, samples, test procedures, test data processing and test reports.

This standard applies to the test of the purification performance of photocatalytic materials with the purification performance of aqueous solution.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this document. For the cited documents without date, the latest version (including all amendments) applies to this document.

GB/T 602 Preparation of standard solution for determination of impurities in chemical reagents

GB/T 6682 Analysis laboratory specifications and test methods

3 Terms and definitions

The following terms and definitions apply to this document.