论文部分内容阅读
我厂使用英国Hilger公司的E 1000光电光谱仪,主要承担铝、镁合金的分析,所配光源是FS273低压火花光源,放电频率为100周/秒。我们曾认为,该光源作含高Si(13%)、高Zn(15%)的铝合金分析是困难的。这是因为,用预燃25秒、曝光10秒激发含Si8%、Zn11%的标样,燃烧斑点为淡白色,试样表面几乎没有侵蚀。含Si、Zn愈高(特别是含Zn愈高),斑点愈小、愈白,周围没有一点黑色。后来延长累计燃烧时间(预燃60秒、曝光15秒),激发斑点稍有好转,但周围仍为白色,还是无法进行铝合金的正常分析。影响激发的原因是什么呢?首先,我们分析了光源。将FS273与日常摄谱法分析铝合金的高压火花光源ИΓ-3进行比较,尽管FS273电容充电电压低(460伏),但电容量却很大(10微法和20微法),
I plant using the British Hilger’s E 1000 photoelectric spectrometer, the main commitment to aluminum, magnesium alloy analysis, with the light source is FS273 low-voltage spark light source, the discharge frequency of 100 weeks / second. We used to think that the light source was difficult to analyze for aluminum alloys with high Si (13%) and high Zn (15%). This is because, with the pre-burning 25 seconds, 10 seconds exposure to excitation Si8%, Zn11% of the standard burning spot is pale white, the sample surface almost no erosion. Containing Si, Zn higher (especially higher Zn), the smaller the spot, the more white, around a little black. Later, the cumulative burning time was extended (pre-burning 60 seconds, exposure 15 seconds), stimulate the spot a little better, but the surrounding is still white, or can not be normal analysis of aluminum. What is the cause of the stimulus? First of all, we analyze the light source. Comparing the FS273 with the high-voltage spark source ИΓ-3 for routine spectroscopy analysis of aluminum alloys, the capacitance of the FS273 capacitor is large (10 and 20 microfarads) despite its low charge voltage (460 V)