T/LFX 005-2023 Active

Scope: This document describes the principles, reagents, equipment, sampling, testing methods, and result determination of a rapid detection method for chloride ion content levels in inorganic fertilizers. This document is applicable to the on-site rapid detection and identification of chloride ion content levels in inorganic fertilizers. Main technical content: A rapid detection method for chloride ion content levels in inorganic fertilizers. 1  Scope This document describes the principles, reagents, equipment, sampling, testing methods, and result determination of a rapid detection method for chloride ion content levels in inorganic fertilizers. This document is applicable to the on-site rapid detection and identification of chloride ion content levels in inorganic fertilizers. 2  Normative references The content of the following documents is an indispensable part of this document through normative references. Among them, the referenced documents with a specified date apply only to the version corresponding to that date. The latest version (including all amendment sheets) of the unspecified date referenced documents applies to this document. GB/T 6682 Specifications and Test Methods for Water Used in Analytical Laboratories 3  Terms and definitions This document does not define any terms or definitions. 4  Principle The sample solution uses potassium chromate as an indicator, and a quantitatively added standard solution of silver nitrate is added. The excess silver nitrate reacts with CrO42- to form a brick-red precipitate, and the chloride ion content level is determined by the color of the solution. 5  Reagents 5.1 Reagents and experimental water The reagents used in this document, unless otherwise specified, refer to analytical-grade reagents; the water used to prepare standard solutions shall comply with the specifications of Class III water in GB/T 6682; and the experimental water shall be drinking pure water. 5.2 Indicator The preparation method of the indic