Totox Value in Oils, Oilseeds, and Feed Materials

What is Totox Value?

Totox Value is a calculated parameter used to estimate the overall oxidation status of an oil or fat. It combines information from both early-stage oxidation (peroxides) and later-stage oxidation (aldehydes) into a single value.
This makes Totox a practical indicator of total oxidative deterioration at a given point in time.

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Role and importance

Totox is not a direct measurement, but a combined index that reflects multiple stages of oxidation.
It helps to:
‣ Provide a more complete picture than individual parameters
‣ Simplify interpretation for quality decisions
‣ Identify oils that may appear acceptable when only one parameter is considered
‣ Support overall quality specifications
It is particularly useful in routine testing where quick, consolidated assessment is needed.

Totox in food, feed, and raw materials

The usefulness of Totox depends on the type of material and how oxidation progresses:
Refined food oils
‣ Commonly used to assess freshness and overall quality
‣ Helps identify oils that have undergone partial degradation
Oilseeds
‣ More useful when both early and advanced oxidation are present
‣ Supports interpretation alongside PV and p-AV
Fishmeal
‣ Highly relevant due to rapid progression of oxidation
‣ Helps interpret cases where early oxidation markers are no longer reliable
Animal by-products (e.g. poultry by-product meal)
‣ Useful for comparing variable raw materials
‣ Provides a single value for screening batches
In these matrices, Totox is most valuable where oxidation stages overlap.

Stability and
behaviour

Totox reflects the combined presence of:
‣ Early oxidation products (peroxides)
‣ Secondary oxidation products (aldehydes)
Key behaviour to understand:
‣ A high Totox value indicates significant overall oxidation
‣ A moderate value can represent different scenarios depending on how oxidation has progressed
Because it is a combined value:
‣ It does not distinguish between oxidation stages
‣ It must be interpreted together with its underlying parameters
Factors influencing Totox:
‣ Storage conditions and duration
‣ Heat exposure during processing
‣ Fat composition (degree of unsaturation)
‣ Presence of antioxidants or pro-oxidants
Totox should be treated as a summary indicator, not a standalone diagnostic result.

Why analysis matters

Totox is useful for translating complex oxidation data into a single, actionable value, particularly in quality control environments.
Key reasons for analysis include:

Verification
‣ Confirms whether oils meet overall oxidation limits
‣ Allows comparison between batches and suppliers
Quality control
‣ Tracks total oxidation during storage and handling
‣ Identifies materials that may fall outside specification
Formulation accuracy
‣ Supports decisions on raw material acceptance
‣ Helps guide antioxidant use in formulations

Real-world impact
‣ High Totox values are associated with reduced stability and shelf life
‣ In feed, this can affect intake and performance
‣ In food oils, it impacts flavour quality and product acceptability
In practice, Totox is always interpreted alongside:
‣ Peroxide Value (PV) → early oxidation
‣ p-Anisidine Value (p-AV) → secondary oxidation

This ensures both detail and context are maintained while using Totox as a simplified overview.

Telephone

Email Address

Office Address

Totox Value in Oils, Oilseeds, and Feed Materials

What is Totox Value?

+27 (11) 316 8800

Role and importance

Totox in food, feed, and raw materials

Stability and
behaviour

Why analysis matters

GET IN TOUCH

Telephone

Email Address

Office Address

Totox Value in Oils, Oilseeds, and Feed Materials

What is Totox Value?

+27 (11) 316 8800

Role and importance

Totox in food, feed, and raw materials

Stability andbehaviour

Why analysis matters

GET IN TOUCH

Stability and
behaviour