Os teores de compostos fenólicos totais (CFT), flavonoides totais (FT) e ácido ascórbico (AA) foram determinados em 18 polpas de frutas congeladas, assim como a capacidade antioxidante na desativação do radical peroxila (ROO•), peróxido de hidrogênio (H2O2) e radical hidroxila (•OH). De acordo com a Análise de Componentes Principais (ACP), CFT e AA apresentaram correlação positiva com a capacidade de desativar o ROO• e o teor de FT apresentou correlação positiva com a capacidade de desativar o •OH e ROO•. Entretanto, a capacidade de desativar o H2O2 apresentou baixa correlação com FT, CFT e AA. A Análise Hierárquica de Agrupamentos (HCA) permitiu a separação das polpas de frutas em três grupos: o primeiro formado pela polpa de açaí, com elevado teor de FT (134,02 mg EC/100 g polpa) e maior desativação do ROO•, •OH e H2O2; o segundo pela polpa de acerola, com elevado teor de CFT (658,40 mg EAG/100 g polpa) e de AA (506,27 mg/100 g polpa); e o terceiro grupo formado pelas polpas de abacaxi, cacau, cajá, caju, coco, cupuaçu, goiaba, laranja, limão, manga, maracujá, melancia, pitanga, tamarindo, tangerina e umbu, que não puderam ser separadas considerando apenas os teores dos compostos bioativos e a propriedades antioxidantes.

The contents of total phenolic compounds (TPC), total flavonoids (TF), and ascorbic acid (AA) of 18 frozen fruit pulps and their scavenging capacities against peroxyl radical (ROO•), hydrogen peroxide (H2O2), and hydroxyl radical (•OH) were determined. Principal Component Analysis (PCA) showed that TPC (total phenolic compounds) and AA (ascorbic acid) presented positive correlation with the scavenging capacity against ROO•, and TF (total flavonoids) showed positive correlation with the scavenging capacity against •OH and ROO• However, the scavenging capacity against H2O2 presented low correlation with TF (total flavonoids), TPC (total phenolic compounds), and AA (ascorbic acid). The Hierarchical Cluster Analysis (HCA) allowed the classification of the fruit pulps into three groups: one group was formed by the açai pulp with high TF, total flavonoids, content (134.02 mg CE/100 g pulp) and the highest scavenging capacity against ROO•, •OH and H2O2; the second group was formed by the acerola pulp with high TPC, total phenolic compounds, (658.40 mg GAE/100 g pulp) and AA , ascorbic acid, (506.27 mg/100 g pulp) contents; and the third group was formed by pineapple, cacao, caja, cashew-apple, coconut, cupuaçu, guava, orange, lemon, mango, passion fruit, watermelon, pitanga, tamarind, tangerine, and umbu pulps, which could not be separated considering only the contents of bioactive compounds and the scavenging properties.

A method to quantify lycopene and β-carotene in freeze dried tomato pulp by high performance liquid chromatography (HLPC) was validated according to the criteria of selectivity, sensitivity, precision and accuracy, and uncertainty estimation of measurement was determined with data obtained in the validation. The validated method presented is selective in terms of analysis, and it had a good precision and accuracy. Detection limit for lycopene and β-carotene was 4.2 and 0.23 mg 100 g-1, respectively. The estimation of expanded uncertainty (K = 2) for lycopene was 104 ± 21 mg 100 g-1 and for β-carotene was 6.4 ± 1.5 mg 100 g-1.