Description
Pectin gelation is governed by the degree of methoxylation, with high‑methoxyl pectin requiring high sugar and acidic conditions, and low‑methoxyl pectin relying on calcium cross‑linking.
Technical
High‑methoxyl pectin (HM‑Pectin) gels at 80–90 °C when sugar concentration is ≥55 % (w/w) and pH is 3.5–4.0; gelation occurs via hydrophobic interactions and hydrogen bonding within the homogalacturonan chains. Low‑methoxyl pectin (LM‑Pectin) requires Ca²⁺ (≈0.5–1.0 mmol Ca²⁺ per g pectin) and sugar ≤45 % (w/w) to form a calcium‑cross‑linked network; gelation can begin at 70–80 °C and completes within 5–10 min.
Science
Primary Reaction
Gelation of pectin via hydrophobic interactions and hydrogen bonding (HM) or calcium cross‑linking (LM)
Sensory Profile
Aroma ()
sweetfruitycitruswarmcaramelizedjam-likeslightly floral