How CDR CiderLab Supports Chemical Analysis for Sidra da Madeira IGP in Madeira’s Public Agri-Food Laboratory

Sidra da Madeira is a traditional cider deeply rooted in the agricultural identity of Madeira Island. Produced from the fermentation of natural juice pressed from apples, and sometimes pears, grown exclusively on the island, it reflects the unique characteristics of Madeira’s orchards, climate, fruit varieties and cidermaking tradition.

In 2023, Sidra da Madeira was officially entered in the EU register of Protected Geographical Indications, IGP, further strengthening the need for reliable analytical control throughout production. The product specification defines key chemical parameters, including alcoholic strength, fermentable sugars, total acidity, volatile acidity and total sulphur dioxide, all of which are essential for confirming product conformity and preserving the identity of this regional cider.

In this context, the Laboratory of the Directorate of Agricultural and Agri-Food Laboratories, part of the Regional Directorate of Agriculture and Rural Development of Madeira, uses CDR CiderLab as part of its chemical analysis workflow for Sidra da Madeira IGP and other cider products.

For a product with IGP status, quality control goes beyond routine laboratory analysis. It is part of a broader conformity assessment process that supports producers, protects product identity and helps ensure that the cider placed on the market complies with mandatory requirements.

Sidra da Madeira IGP is defined by its close link with its geographical area. The fruit must be grown on Madeira Island, and the entire production process, from raw material processing to fermentation, ageing, preservation and packaging, must take place on the island. This relationship between territory, raw material and production method makes analytical control especially important.

According to the product specification, Sidra da Madeira must generally comply with defined chemical characteristics, including:

Minimum alcoholic strength: 5% vol.
Fermentable sugars: less than 15 g/L
Total acidity: minimum 3 g/L and up to 10 g/L, expressed as malic acid
Volatile acidity: maximum 1.8 g/L, expressed as acetic acid
Total sulphur dioxide: maximum 200 mg/L, expressed as SO₂

These parameters are important not only for regulatory conformity, but also for monitoring fermentation performance, product stability and consistency between batches.

Zita Maria de Caires de Vasconcelos - Chef de Divisão Veterinary Analysis Division and Coordination of Sensory Analyzes, Management System Manager explains:

 "Here in Madeira Island, at the Laboratory of the Directorate of Agricultural and Agri‑Food Laboratories (Direção de Serviços dos Laboratórios Agrícolas e Agroalimentares), within the Regional Directorate of Agriculture and Rural Development -  we use the CDR CiderLab equipment for chemical analysis."

"This methodology has proven to be fast, versatile, and efficient for evaluating the parameters of Sidra da Madeira IGP as well as other ciders. In just a few minutes, we are able to obtain precise results for the chemical parameters present in the cider."

"We also use the CDR CiderLab for some fruit juices, in order to evaluate sugars, acids, pH and other relevant parameters. Currently, the CDR CiderLab is used to validate the fermentation process of the Public Service Cidery and external producers, as well as to confirm at the end of production whether the cider complies with the mandatory legal requirements."

As reported by the laboratory, the system supports the evaluation of parameters related to fermentation and product quality, including sugars, organic acids, pH and other relevant analytical indicators.

The system is currently used to support two main activities:

• Fermentation process validation, both for the Public Service Cidery and for external producers.
• Final product conformity assessment, to confirm whether the cider complies with mandatory legal requirements at the end of production.

This dual role makes CDR CiderLab useful both during the production process and at the final control stage, where chemical results contribute to the technical opinion required for Sidra da Madeira IGP validation.

The laboratory also notes a sustainability-related trade-off: although the method relies on high-value reagent kits, it generates fewer laboratory residues and simplifies routine analytical work.

For protected geographical indication products, conformity assessment is based on a combination of product identity, production rules and measurable quality parameters. In Madeira, the internal validation mechanism for Sidra da Madeira IGP includes both sensory evaluation and chemical analysis.

CDR CiderLab contributes to this process by providing rapid chemical data that can be used alongside sensory assessment. This integration is important because cider quality cannot be evaluated through sensory characteristics alone. Parameters such as residual sugars, total acidity, volatile acidity, alcohol content and sulphur dioxide provide objective information on fermentation completion, product balance and compliance with the specification.

For laboratories working with regional fermented beverages, this type of analytical support can help reduce uncertainty, speed up decision-making and create a more structured quality control process.

The Madeira laboratory also uses CDR CiderLab for selected fruit juices, where it supports the evaluation of sugars, acids, pH and other relevant parameters. This broader application is consistent with the needs of laboratories that manage different fruit-based matrices and require a versatile system for routine control.

In this sense, the system is not limited to the final cider product. It can support different stages of the production chain, from raw material evaluation to fermentation monitoring and final product verification.

Another aspect highlighted by the laboratory is sustainability. Although reagent kits are a key technical component of the method, the system helps reduce laboratory residues compared with more traditional workflows. For institutional and quality control laboratories, this represents an important operational benefit, especially when routine analyses are performed regularly.

The combination of reduced waste generation, rapid response times and simple analytical procedures supports a more efficient approach to cider quality control. For producers and laboratories, this means faster access to data, fewer delays in decision-making and a more practical way to manage analytical verification.

The experience of the Madeira laboratory shows how rapid chemical analysis can support the protection and validation of a traditional fermented beverage with IGP status.

In the case of Sidra da Madeira IGP, analytical control is directly connected to product identity. The cider must reflect the characteristics of the island’s fruit, production methods and sensory profile, while also complying with defined chemical requirements. CDR CiderLab provides the laboratory with a practical tool to monitor these parameters efficiently, supporting both producers and institutional conformity assessment.

This case study highlights the value of combining tradition with analytical innovation. For regional products such as Sidra da Madeira IGP, reliable chemical data help safeguard authenticity, improve process control and reinforce consumer trust in the final product.

The experience of the Directorate of Agricultural and Agri-Food Laboratories in Madeira shows how CDR CiderLab can support the analytical control of Sidra da Madeira IGP within a real institutional context.

By providing fast chemical results, the system helps validate fermentation processes, verify compliance with mandatory legal requirements, and complement sensory evaluation in the conformity assessment process. 

Its use for both cider and selected fruit juices also confirms its versatility in routine analysis of sugars, acids, pH, and other relevant parameters. 

While the method relies on high-value reagent kits, the laboratory highlights its contribution to simpler, faster analysis with fewer laboratory residues, supporting a more efficient and environmentally conscious approach to quality control.