Overview
ISO 5223:1995/Amd 1:1999 is an important amendment to the international standard for test sieves used specifically for cereals. Published by the International Organization for Standardization (ISO), this amendment introduces additional sieve sizes to enhance the accuracy and range of laboratory testing for cereals. Test sieves are essential tools for determining undesirable substances in cereal samples, such as shrivelled kernels, broken grains, and small fragments, ensuring quality control and consistency in cereal production and processing.
By specifying new nominal aperture sizes and detailed dimensional tolerances, this amendment supports improved separation and classification of cereal components like rye, wheat, barley, rice, sorghum, and maize.
Key Topics
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Test Sieves for Cereals
Designed to separate undesirable cereal particles based on size, the sieves feature two types of apertures:
- Long rounded apertures (e.g., 1.00 mm to 3.55 mm)
- Round apertures (e.g., diameters 1.40 mm, 1.80 mm, 4.50 mm)
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Additional Sizes Introduced
The amendment adds a comprehensive range of sieve sizes to cover specific applications such as:
- Separating shrivelled kernels in various cereal types
- Grading rice kernels with apertures of 1.50 mm and 1.60 mm
- Calibrating malting barley using 2.50 mm and 2.80 mm aperture sieves
- Separating rice chips (1.40 mm diameter round apertures)
- Sifting sorghum with 1.80 mm diameter apertures
- Separating broken maize grains using 4.50 mm diameter apertures
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Dimensional Specifications and Tolerances
The amendment defines detailed measurements for aperture width, length, pitch (distance between aperture centers), and acceptable tolerances to maintain sieve precision and repeatability in testing.
Applications
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Quality Control in Cereal Processing
ISO 5223:1995/Amd 1:1999 sieves are widely used in laboratories to ensure cereals meet quality standards by detecting and quantifying undesirable materials that affect production and consumer safety.
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Agricultural Research and Certification
Researchers and certification bodies utilize these sieves to classify and grade cereal samples accurately according to international standards, facilitating trade and regulatory compliance.
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Malting and Brewing Industry
Specific sieve sizes enable precise calibration of malting barley, a critical factor affecting malt quality and beer production.
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Rice Milling and Grading
Dedicated sieves help in grading rice varieties and separating impurities, ensuring consistent product quality for food manufacturers and suppliers.
Related Standards
- ISO 8114 – Specifies laboratory sieves with different aperture types for food and agriculture.
- ISO 565 – General test sieves – metal wire cloth – nominal sizes of openings.
- ISO 425 – Determination of sifting performance – test methods for test sieves.
- ISO/TC 34 – The ISO technical committee responsible for agricultural food product standards, including cereals and pulses.
Keywords: ISO 5223 amendment, test sieves for cereals, cereal quality control, cereal testing standards, sieve aperture sizes, cereal laboratory testing, malting barley calibration, cereal impurities separation, rice grading sieves, ISO cereal standards.