Oxalate Analysis Labouratory and Statistical Data

The data support both the quantitative findings and the method comparison presented in this study.1. Raw Analytical DataThis includes:Spectrophotometric data: Triplicate absorbance measurements for each sample, calibration curve data (standard concentrations vs absorbance), and calculated oxalate concentrations.Titrimetric data: Triplicate titre values (mL) for each sample, average titre values, and corresponding oxalate concentrations calculated using the equivalence factor (1 mL of 0.1 M KMnO₄ = 2.2 mg oxalate).Each sample is identified by:Vegetable type (waterleaf, bitter leaf, cocoyam leaves, jute leaves)Treatment (fresh or heat-treated)Geographical block (Block A: highland; Block B: lowland)2.

Processed DatasetThis dataset contains:Final oxalate concentrations (mg/100 g) for both analytical methodsMean ± standard deviation (n = 3) for each sample groupStructured dataset used for statistical analysis (RCBD ANOVA)Variables include:Group (e.g., WFH, BFL, etc.)VegetableTreatmentBlockSpectrophotometric (mg/100 g)Titrimetric (mg/100 g)3. Statistical Analysis OutputsANOVA tables (RCBD) including sum of squares, F-values, p-values, and partial eta squared (η²ₚ)Tukey HSD post hoc groupingsNormality (Shapiro–Wilk test) and homogeneity (Levene’s test) resultsRelative standard deviation (RSD) calculations for precision assessment4.