Data on analysis of Brazilian milk powder.

Description

This dataset provides information on the concentration of Al, As, Ba, Cd, Co, Cr, Cu, Fe, Mg, Mn, Mo, Ni, Pb, Se, V and Zn, as well as thermogravimetric analysis (TG) and differential scanning calorimetry (DSC) and acid methyl esters (FAMEs) from ten samples of Brazilian powdered milk used in infant feeding. Ten brands of Brazilian companies that sell powdered milk used as food. In detail, the dataset presents: 1- Values of concentrations of Al, As, Ba, Cd, Co, Cr, Cu, Fe, Mg, Mn, Mo, Ni, Pb, Se, V and Zn in powder milk were obtained by Inductively coupled plasma-optical emission spectroscopy (ICP-OES) (The file "Table 1 -Raw data on Macro- Microelements" contains the concentration of macro and microelements obtained in ten Brazilian companies) 2- Thermogravimetry (TG) and Differential Scanning Calorimetry (DSC) data were performed using thermal analyzer STA 449 F3 Jupter, Netzsch, Selb Alemanha. Graphs were obtained using Universal Analysis Software (The "Raw Thermal Analysis-sample" files contain TG and DSC analysis data from ten Brazilian companies). 3- The fatty acid methyl esters (FAMEs) ere analyzed by gas chromatography (GC 2010, Shimadzu, Kyoto, Japan) to obtain their individual peaks (The "Raw data-fat-composition" files contain FAME analysis data from ten Brazilian companies).

Steps to reproduce

Sampling and preparation: In supermarkets in the city of Campo Grande, MS, Brazil, 10 lots were purchased from each of the ten companies that sell powdered milk, totaling 100 samples. In order to obtain a representative sample from each company, ten batches of powdered milk from each company were selected and mixed. For this study, infant formulas aged 0 to 6 months, 6 to 12 months and 12 to 36 months were considered. Acid digestion of samples and quantification of Macro- and microelements: In an amount of 300 mg of each powdered milk sample, 2 mL of nitric acid (65%, Merck - Darmstadt, Germany), 1 mL of hydrogen peroxide (30%, Merck - Darmstadt, Germany) and 1 mL of ultrapure H2O. After digestion, 10 mL of ultrapure water was added to each sample. Thus, values of concentrations of Al, As, Ba, Cd, Co, Cr, Cu, Fe, Mg, Mn, Mo, Ni, Pb, Se, V and Zn in digested milk powder were obtained by Inductively coupled plasma-optical emission spectroscopy (model iCAP 6300, Thermo Scientific- ICP-OES). Thermal analysis: To obtain the Thermogravimetric analysis (TGs) and differential scanning calorimetry (DSC) date, approximately 10 mg of samples were heated from 25 to 750 °C under synthetic air flow (50 ml/min), heating rate of 10 °C/min. Thermogravimetric analysis (TGs) and differential scanning calorimetry (DSC) curves were obtained simultaneously in a thermal analyzer STA 449 F3 Jupter, Netzsch, Selb Alemanha. Fatty Acid Methyl Esters (fames) The fatty acid methyl esters (FAMEs) were prepared with a derivatization solution of ammonium chloride, methanol and sulfuric acid. The methyl esters of the fatty acids were analyzed by gas chromatography (GC 2010, Shimadzu, Kyoto, Japan) to obtain their peaks. We utilized a flame ionization detector (FID) and a capillary column (BPX-70, internal diameter of 0.25 mm, 30 m long, and 0.25 mm thick film). The temperature of the injector and the detector was 250 °C. The initial temperature of the column was kept at 80 °C for 3 min and then increased by 10 °C/min until reaching 140 °C, followed by an increase to 240 °C/min for 5 min. The individual peaks of the FAMEs (fatty-acid methyl esters) were identified by comparing their relative retention times with the standard of 37 FAMEs (Supelco C22, 99% pure).

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