分光光度法测定巴基斯坦拉合尔牛奶样品中重要矿物质以确保食品安全

Q4 Chemistry

Bulgarian Chemical Communications Pub Date : 2019-01-01 DOI:10.34049/BCC.51.2.4833

R. Rehman, T. Tanveer

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引用次数: 0

摘要

对巴基斯坦拉合尔地区常见的不同奶粉样品进行了必需金属离子和有毒金属离子的测定。样品从当地市场收集，干燥灰化后，溶解在2M硝酸中进行完全矿化。然后用火焰光度法和原子吸收光谱法测定金属离子的浓度。所有样品的镉、铅、镍含量均低于检出限，钠、钾、钙、镁、铁、锌含量的最大值分别为48.55、0.96、4.94 mg/g和768、4.12、3.02 mg/g。这些金属离子的最低含量分别为:3.69、0.07、0.85 mg/g和214、0.21、1.02 μg/g。所有金属离子的含量均在世卫组织建议的安全范围内。

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Spectrophotometric determination of significant minerals in milk samples found in Lahore (Pakistan) for ensuring food safety

This work was carried out for determination of essential and toxic metals ions in different milk powder samples commonly found in Lahore (Pakistan). Samples were collected from local markets and after dry ashing, they were dissolved in 2M nitric acid for complete mineralization. Then the concentration of metal ions was determined by flame photometry and atomic absorption spectrometry. The concentration levels of cadmium, lead and nickel were found to be below detection limits in all samples, whereas the maximum values of sodium, potassium, calcium, magnesium, iron, and zinc were 48.55, 0.96, 4.94 mg/g, and 768, 4.12 and 3.02 μg/g respectively. Minimum amounts of these metal ions were: 3.69, 0.07, 0.85 mg/g and 214, 0.21, 1.02 μg/g, respectively. The amounts of all metal ions were found to be within safe limits as recommended by WHO.

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