ISO 8682:1987 PDF

Apples — Storage in controlled atmospheres

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Title (English):

ISO 8682:1987

Apples — Storage in controlled atmospheres

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 6
Publication date:: November 19, 1987
Edition:: ISO IS 8682 edition 1 version 1
ICS:: 67.080.10

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Description (English):

The guidance provides conditionds of harvesting and putting into store, and it specifies optimal storageconditions, as temperature, relative humidity, atmosphere circulation, chemical composition of the atmosphere, checking and storage life. An annex A describes optimal conditions for 15 principal varieties. An annex B shows defects arising during storage.

Technical details

Technical committee: ISO/TC 34/SC 3 - Fruits and vegetables and their derived products
SKU: ISO 8682:1987

Abstract

Overview

ISO 8682:1987 - "Apples - Storage in controlled atmospheres" provides internationally agreed guidance on harvesting, handling and long‑term storage of apples in controlled-atmosphere (CA) cold stores. The standard covers optimal storage conditions (temperature, relative humidity, air circulation), chemical composition of the storage atmosphere (O2/CO2), monitoring and control procedures, packaging and stacking recommendations, pre‑cooling and handling, and methods to check storage life. Annex A lists optimal conditions for principal apple varieties; Annex B documents common storage defects and physiological disorders.

Keywords: ISO 8682, apples storage, controlled atmosphere, CA storage, postharvest, cold storage, storage life.

Key topics and technical requirements

Harvest and selection
- Hand harvest only for CA storage; sort out diseased, damaged or unsuitable fruit prior to storage.
- Harvest timing based on variety‑specific maturity indicators (flesh color, starch tests, firmness, days from bloom, ethylene production).
Storage environment
- Temperature: Variety‑dependent; optimal storage temperature should be reached within one week of filling and maintained throughout storage (document gives 0–4 °C ranges for many varieties).
- Relative humidity: High humidity is specified - generally 90–95% to reduce shrivel.
- Air circulation & stacking: Maintain good airflow between stacks (minimum air speed between piles > 0.25 m/s). Maximum stacking heights ~6 m for crates and ~7.5 m for pallet crates; leave top and side clearances to permit gas flow.
- Air renewal rates: During cooling ~40 room volumes/hour; after cooling ~20 volumes/hour.
Controlled atmosphere composition
- Atmosphere setpoints are variety‑specific (Annex A). Typical CA values in the standard: low oxygen and elevated CO2 (oxygen often in the low-percent range, CO2 commonly a few percent). Composition should be achieved within 2–3 days with appropriate equipment and maintained (static or dynamically adjusted).
Monitoring and control
- Daily checks of temperature, humidity and gas composition using direct‑reading instruments or recorders; quality sampling increases in frequency toward end of storage.
- Pre‑cool to 0 °C before loading; avoid condensation by adjusting temperature; doors closed airtight after cooling.
End of storage
- Before access, open doors and run fans for 1–2 hours to disperse excess CO2.

Applications - who uses ISO 8682

Cold‑store and CA storage managers and designers
Fruit packers, growers and exporters planning long‑term apple storage
Quality assurance teams, postharvest technologists and researchers
Consultants setting CA protocols for specific apple cultivars

Practical benefits: extends shelf life, slows metabolism and disease development, reduces physiological disorders when CA parameters and handling follow the standard.

Related standards

ISO 2169 - physical conditions of refrigeration
ISO 3659 - ripening after refrigerated storage
ISO 6949 - principles and techniques of controlled atmosphere storage

For implementation, consult Annex A for variety‑specific setpoints and Annex B for diagnosis and prevention of storage disorders.

Related standards

Standards mentioned in the description

Abstract

Overview

Keywords: ISO 8682, apples storage, controlled atmosphere, CA storage, postharvest, cold storage, storage life.

Key topics and technical requirements

Harvest and selection
- Hand harvest only for CA storage; sort out diseased, damaged or unsuitable fruit prior to storage.
- Harvest timing based on variety‑specific maturity indicators (flesh color, starch tests, firmness, days from bloom, ethylene production).
Storage environment
- Temperature: Variety‑dependent; optimal storage temperature should be reached within one week of filling and maintained throughout storage (document gives 0–4 °C ranges for many varieties).
- Relative humidity: High humidity is specified - generally 90–95% to reduce shrivel.
- Air circulation & stacking: Maintain good airflow between stacks (minimum air speed between piles > 0.25 m/s). Maximum stacking heights ~6 m for crates and ~7.5 m for pallet crates; leave top and side clearances to permit gas flow.
- Air renewal rates: During cooling ~40 room volumes/hour; after cooling ~20 volumes/hour.
Controlled atmosphere composition
- Atmosphere setpoints are variety‑specific (Annex A). Typical CA values in the standard: low oxygen and elevated CO2 (oxygen often in the low-percent range, CO2 commonly a few percent). Composition should be achieved within 2–3 days with appropriate equipment and maintained (static or dynamically adjusted).
Monitoring and control
- Daily checks of temperature, humidity and gas composition using direct‑reading instruments or recorders; quality sampling increases in frequency toward end of storage.
- Pre‑cool to 0 °C before loading; avoid condensation by adjusting temperature; doors closed airtight after cooling.
End of storage
- Before access, open doors and run fans for 1–2 hours to disperse excess CO2.

Applications - who uses ISO 8682

Cold‑store and CA storage managers and designers
Fruit packers, growers and exporters planning long‑term apple storage
Quality assurance teams, postharvest technologists and researchers
Consultants setting CA protocols for specific apple cultivars

Practical benefits: extends shelf life, slows metabolism and disease development, reduces physiological disorders when CA parameters and handling follow the standard.

Related standards

ISO 2169 - physical conditions of refrigeration
ISO 3659 - ripening after refrigerated storage
ISO 6949 - principles and techniques of controlled atmosphere storage

For implementation, consult Annex A for variety‑specific setpoints and Annex B for diagnosis and prevention of storage disorders.

ISO 8682:1987 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Applications - who uses ISO 8682

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Applications - who uses ISO 8682

Related standards

Related standards

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Fruits and vegetables -- Physical conditions in cold stores -- Definitions and measurement

Fruits and vegetables -- Ripening after cold storage

Fruits and vegetables -- Principles and techniques of the controlled atmosphere method of storage