铅合金中镁、镍等11种杂质元素含量的测定数据

铅由于其韧性好、熔点低以及密封性好做为电缆护套材料，而铅合金中杂质元素含量对其性能有着重要影响，GB/T 26011-2010《电缆护套用铅合金锭》对铅合金中镁、镍等杂质含量做出限定要求，本实验使用辉光放电质谱仪对铅合金中杂质元素进行测量，为企业生产提供数据支持。1.样品测试：处理样品至合适尺寸，在进行表面清洗处理，烘干后上机测试；2.测试原理：样品作为阴极进行辉光放电，其表面原子被溅射而脱离试样进入辉光放电等离子体中，在等离子体中离子化后被导入质谱仪；3.在每一元素同位素质量数处以预设的扫描点数和积分时间对相应谱峰积分，所得面积即为谱峰强度，将各元素的谱峰强度和主量元素Pb的谱峰强度相比较，再乘以灵敏度因子，即可得出元素含量。计算公式为
W=RSF/RSFPb×I×APb/(Ipb×A)*100，式中：W为杂质元素含量（%），RSF为杂质元素灵敏度因子，I为杂质元素测试同位素谱峰强度，A为杂质元素同位素丰度，APb为主量元素铅同位素丰度，Ipb为主量元素铅的谱峰强度，100为质量系数100%,如杂质元素含量小于0.0001%，则以＜0.0001%报出。

Lead is widely used as a cable sheath material due to its good toughness, low melting point and excellent sealing performance. The content of impurity elements in lead alloys has a significant impact on their properties. GB/T 26011-2010 "Lead Alloy Ingots for Cable Sheaths" specifies the allowable limits for impurity elements such as magnesium and nickel in lead alloys. In this experiment, glow discharge mass spectrometry was employed to measure the impurity elements in lead alloys, providing data support for enterprise production.

1. Sample Testing: Process the samples to appropriate dimensions, perform surface cleaning, dry them and conduct testing on the instrument.
2. Testing Principle: The sample acts as the cathode during glow discharge, where atoms on its surface are sputtered off and enter the glow discharge plasma, then ionized in the plasma and introduced into the mass spectrometer.
3. Quantification: Integrate the corresponding spectral peaks at each isotope mass number of the target element with preset scanning points and integration time. The obtained integrated area is the spectral peak intensity. Compare the spectral peak intensity of each element with that of the major element Pb, multiply by the sensitivity factor to get the element content. The calculation formula is: $W = frac{RSF}{RSF_{Pb}} imes frac{I imes A_{Pb}}{I_{Pb} imes A} imes 100$, where: $W$ is the mass fraction of the impurity element (%), $RSF$ is the relative sensitivity factor of the impurity element, $RSF_{Pb}$ is the relative sensitivity factor of the major element Pb, $I$ is the peak intensity of the test isotope of the impurity element, $A$ is the isotopic abundance of the test isotope of the impurity element, $A_{Pb}$ is the isotopic abundance of the major element Pb, $I_{Pb}$ is the peak intensity of the major element Pb, and 100 is the mass coefficient for percentage conversion. If the mass fraction of the impurity element is less than 0.0001%, report it as <0.0001%.