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目的了解深圳市初产、顺产妇的乳汁中8种矿物质(钙、钾、钠、镁和微量元素锌、铁、硒、铜)含量和3种有毒元素(铅、砷、镉)负荷水平,以评估该地婴儿8种常量元素和微量元素的营养状况和3种有毒元素污染水平。方法于2007年7～10月采集在深圳生活5年以上20～35岁的初产妇产后3周～2月龄的母乳共60份,采用电感耦合等离子体质谱法及电感耦合等离子体发射光谱法测定母乳中的常量元素钙、钾、钠、镁和微量元素锌、铁、硒、铜及有毒元素铅、砷、镉的含量。结果所测母乳的8种矿物质和重金属中,常量元素钙、钾、钠、镁的平均含量分别是280.22、498.61、188.65和28.31mg/L,微量元素锌、铁、硒、铜的平均含量分别是2.29mg/L、358.88μg/L、8.28μg/L和339.16μg/L,铅的平均含量是2.13μg/L。砷和镉的含量均小于0.005μg/L。结论与国际原子能机构的标准及国内的一些地区调查结果比较,深圳地区母乳中常量元素钙、钾、钠、镁和锌、铁、铜7种矿物质的平均含量基本合理,砷、镉的污染水平低,但是存在微量元素硒的缺乏和重金属铅的污染。
Objective To investigate the contents of 8 minerals (calcium, potassium, sodium, magnesium and trace elements zinc, iron, selenium and copper) and 3 kinds of toxic elements (lead, arsenic and cadmium) in the milk of primipara and primipara in Shenzhen. To assess the nutritional status of 8 kinds of constant elements and trace elements and 3 kinds of toxic elements in this area. Methods A total of 60 breast milk samples of primipara from the third week to the second month of age from 20 to 35 years of age who lived in Shenzhen for more than 5 years were collected from July to October in 2007. Inductively coupled plasma mass spectrometry and inductively coupled plasma atomic emission spectrometry Determination of calcium, potassium, sodium, magnesium and trace elements zinc, iron, selenium, copper and toxic elements of lead, arsenic and cadmium in breast milk. Results The average content of calcium, potassium, sodium and magnesium in eight kinds of minerals and heavy metals in breast milk were 280.22, 498.61, 188.65 and 28.31 mg / L, respectively. The average contents of trace elements zinc, iron, selenium and copper Respectively, 2.29mg / L, 358.88μg / L, 8.28μg / L and 339.16μg / L, the average content of lead is 2.13μg / L. Arsenic and cadmium levels were less than 0.005μg / L. Conclusion Compared with IAEA standards and some regional survey results in China, the average contents of 7 elements in calcium, potassium, sodium, magnesium and zinc, iron and copper of breast milk in Shenzhen are basically reasonable, and the pollution of arsenic and cadmium Low levels, but the presence of trace elemental selenium deficiency and heavy metals lead pollution.