Patulin Risk Starts Before the Apple Press

A chemical hazard, not a cosmetic defect

Patulin is a mycotoxin produced by moulds that can grow on apples. It is not the same as the visible rot that a sorter sees, and it is not removed by a routine appearance check. FDA's juice HACCP guidance links high patulin levels to rotting or mouldy apples, fallen fruit, damaged or bruised fruit and storage conditions that allow mould growth. The hazard belongs in the hazard analysis, not only in a quality grade.

The word risk matters here. A lot with some visible defects is not automatically condemned, and a lot that looks clean is not automatically cleared. The point is to control the conditions that allow patulin-producing moulds to develop and to verify the result. That requires a chain from supplier practice through receiving, storage and sorting to the press.

Source for this section FDA Juice HACCP guidance

The risky fruit is often the fruit that looks unsellable

Fallen fruit, fruit with insect or bird damage, bruised fruit and fruit held in conditions that encourage mould are the categories FDA identifies as more susceptible. These are also the categories a fresh-market operation may reject. A juice line that accepts them without a separate control step is importing a hazard that the rest of the process may not remove.

Sorting should therefore be designed around the hazard, not only around size and colour. The sorter needs a clear reject route, enough light and access to inspect the fruit, and a rule for fruit that is doubtful. The rejected stream should be removed from the food chain and recorded. If the reject route is awkward or slow, operators will find a way to keep the line running.

Source for this section FDA Juice HACCP guidance

Heat treatment is not a patulin control

Pasteurization is designed to reduce pathogenic microorganisms. It is not a general destruction step for chemical contaminants. FDA's guidance states that thermal processing does not destroy patulin, so a pasteurized juice can still contain patulin if the fruit carried it into the press. This is the key reason the control has to start upstream.

FDA has established an action level of 50 micrograms per kilogram, or 50 parts per billion, for patulin in apple juice, determined on single-strength juice or reconstituted single-strength juice. The guidance also illustrates how concentrated the hazard can be: one rotten apple containing more than 10,000 parts per billion, used with 200 sound apples, could produce juice above the action level. These are regulatory reference points, not a recipe for blending or dilution.

Source for this section FDA Juice HACCP guidance

Put controls before the press

The first control is supplier practice. Fruit should come from an agreed harvest and handling system, with a clear understanding of what is excluded. The second is receiving inspection, with a reject decision that covers mould, rot, damage and storage breakdown. The third is storage: time, temperature and condition should be recorded, and fruit should not be held in a way that lets mould develop.

Sorting before pressing is the last practical removal point for affected fruit. It should be treated as a process control with a defined reject stream, not a cosmetic trim. Washing removes soil and surface material, but it does not make a mouldy apple acceptable. The project brief should separate washing from sorting and give each duty its own performance requirement.

Source for this section FDA Juice HACCP guidance, FAO general juice manufacture principles

Use analysis to verify, not to replace prevention

Analytical testing can verify that a lot or finished batch is within the intended limit, but it cannot repair a process that accepts suspect fruit. Define the sampling point, sample size, laboratory method and decision rule before the season starts. For concentrate, state whether the result is reported on the concentrate or on a reconstituted single-strength basis. The two are not interchangeable.

A test result should be linked to the lot and to the disposition. If a result is above the action level, the batch should be held and the cause investigated. Blending a suspect batch with clean juice to reach an average is not a control strategy and can obscure the source of the problem. The useful outcome of testing is a decision about the lot, not a number filed away.

Source for this section FDA Juice HACCP guidance

Document the deviation and the disposition

When a lot is rejected or a batch is held, record the reason, the mass, the time and the person responsible. Link the event to the supplier and to the receiving record. If the same supplier or storage condition produces repeated problems, the purchasing and storage brief needs to change. This is how a single deviation becomes a system improvement rather than a recurring surprise.

The HACCP plan should show how patulin is addressed in the hazard analysis and what verification is used. FDA's guidance is clear that the processor remains responsible for identifying hazards that are reasonably likely to occur and for the controls that fit the product and process. A website cannot make that determination for a specific plant, but it can help the project ask for the right records before the press is selected.

Source for this section FDA Juice HACCP guidance

Patulin control questions by process stage

The answers belong in the plant record, not only in a supplier questionnaire.

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