ISO 4285:1977 PDF

Phosphoric acid for industrial use — Guide to sampling techniques

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Title (English):

ISO 4285:1977

Phosphoric acid for industrial use — Guide to sampling techniques

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 4
Publication date:: December 1, 1977
Edition:: ISO IS 4285 edition 1 version 1
ICS:: 71.060.30

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Document language:

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Description (English):

Contains guides concerning the procedure to be followed and the precautions to be observed for the taking, preparation and storage of samples with the view of assess their quality. Deals with the means of delivery, containers for taking samples, technical means for mixing and heating systems. Details the sampling of thermal-process and wet-process acids from large containers and mobile tanks and the safety measures. Has also been approved by the IUPAC.

Technical details

Technical committee: ISO/TC 47 - Chemistry
SKU: ISO 4285:1977

Abstract

Overview

ISO 4285:1977 - "Phosphoric acid for industrial use - Guide to sampling techniques" provides practical guidance for taking, preparing and storing representative samples of industrial phosphoric acid. Approved by IUPAC and developed by ISO/TC 47 (Chemistry), the standard covers sampling from large containers and mobile tanks, handling thermal-process and wet-process acids, equipment selection, mixing and heating methods, and essential safety precautions for quality assessment.

Key topics and requirements

Scope and field of application
- Applies to ortho‑ and polyphosphoric acids from thermal and wet processes, and to crystallized phosphoric acids.
Sampling plan and procedures
- Emphasizes taking representative samples (often three primary samples at bottom, mid‑height and surface) and sampling during filling/emptying when possible.
- For transfers, recommends three samples at start, mid‑point and end of transfer.
- For small containers (e.g.,

Related standards

Other ISO standards

Overview

Key topics and requirements

Scope and field of application
- Applies to ortho‑ and polyphosphoric acids from thermal and wet processes, and to crystallized phosphoric acids.
Sampling plan and procedures
- Emphasizes taking representative samples (often three primary samples at bottom, mid‑height and surface) and sampling during filling/emptying when possible.
- For transfers, recommends three samples at start, mid‑point and end of transfer.
- For small containers (e.g.,

ISO 4285:1977 PDF

Technical details

Abstract

Overview

Key topics and requirements

Related standards

Abstract

Overview

Key topics and requirements

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