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当前位置:首页  >  技术文章  >  XRF能量色散荧光光谱测金仪在贵金属黄金成分测试的优势有哪些?

XRF能量色散荧光光谱测金仪在贵金属黄金成分测试的优势有哪些?

更新时间:2021-08-03      点击次数:1149

XRF能量色散荧光光谱测金仪在贵金属黄金成分测试的优势有哪些?以及黄金K值概念


由于需求增加,金属价格尤其是黄金价格一直在加速上涨。以黄金为例,由于需求旺盛,伴随着高价,珠宝市场充斥着黄铜和薄层镀金铜制品,这些产品声称是金器,实则是赝品。同样,物品的元素(例如类似于黄金的贵金属)的百分比可能高于实际情况。物品(例如珠宝)或其他物品可以出售给例如买家,例如在消费者出售个人珠宝物品以换取现金的情况下。在交易过程中,买家可能不得不在不允许详细分析的环境中对物品进行非常快速的估计。一个常见的情况是,例如,对于购买看起来像纯金或纯金合金的物品(例如珠宝)的黄金买家,当实际购买的物品是简单的镀金金属或具有较低百分比的黄金比表达的黄金。这会给买家带来很大的损失。




贵金属检测仪是一种采用能量散射X射线荧光分析技术(XRF)的智能无损检测仪器,可准确检测金、铂、钯、K金、K铂等首饰中各种元素的含量。 EXF系列贵金属检测仪采用多通道分析仪,同时应用光谱解析技术,能够准确、生动地显示金、铂、钯、银、铑、铜、锌、镍等的光谱形式及其比例。




贵金属探测器的分析方法是由具有一定能量分辨率的X射线探测器同时探测样品发出的各种能量特征X射线。探测器输出信号幅度与接收到的X射线能量成正比,利用能谱仪分析探测器输出信号的能量大小和强度,对样品进行定量和定性分析




EDX-8000Max不仅配备了市场上*SDD探测器,而且超大样品室可以满足各种大尺寸样品的测试,无需拆卸或破坏样品。 8000Max 的特性使其成为黄金和珠宝测试的选择。




应用行业:贵金属及合金成分分析,黄金K值(4k-24K)快速鉴别,千足金和万足金快速鉴别,黄金首饰、手表、钱币真伪检测,牙科合金分析,镀层厚度分析、电镀液金属元素含量分析




特征




完整的无损检测:被测金属不受任何形式的损坏,无论其外观、内部质量或重量如何




测试范围广:可测量各种金、铂等贵金属合金




测试速度快:根据测量要求,30秒至200秒内即可获得测量结果




测量精度高:纯金测量误差±0.1%,




提供谱线重叠对比工具,方便用户查找未知元素的峰


什么是黄金的K值(Karat)?


黄金的重量以金衡盎司为单位(1金衡盎司=31.1034768克),纯度以“K"(K)表示。 K金的“K"是外来词“Karat"的编制,完整的表示:Karat gold(K金),“AU"或“G"是用来表示黄金纯度的符号(即,金量)。




“K纯度"衡量黄金和其他金属合金中金的纯度。 24K表示纯金,不混入其他金属。较低的 K 值意味着较少的黄金; 18K金含有75%的金,25%是其他金属,通常是铜或银。




各国对于一个物体应该被称为金块的最小K值有不同的要求。在美国,10K 是黄金纯度的法定可接受标准,14K 是常见的。在法国、英国、奥地利、葡萄牙和爱尔兰,9K是被允许称为黄金的低纯度。在丹麦和希腊,8K 是法定的低标准。

gold karat.jpg


Because of the increasing demand, the price of metals and especially gold has been rising at an accelerating rate. In the case of gold, due to high demand and accompanying high prices, the jewelry market is flooded with brass and thin-layer gold-plated copper products that claim to be gold objects but instead are fakes. Similarly, an article can exhibit a higher percentage of elements (such as precious metals similar to gold) than it actually is. Items (such as jewelry) or other items may be sold to, for example, buyers, for example in the case of consumers selling personal jewelry items for cash. During the transaction, the buyer may have to make very fast estimates of the item in an environment that does not allow detailed analysis. A common situation is, for example, for a gold buyer who purchases an item (such as jewelry) that appears as pure gold or pure gold alloy, when the item actually purchased is instead a simple gold-plated metal or has a lower percentage of gold than the expressed gold. This will cause great losses to buyers.


The precious metal detector is an intelligent non-destructive testing instrument using energy scattering X-ray fluorescence analysis technology (XRF), which can accurately detect the content of various elements in gold, platinum, palladium, K gold, K platinum and other jewelry. The EXF series of precious metal detectors use multi-channel analyzers, and at the same time apply spectrum-resolving technology, to accurately and vividly display the content of many elements in jewelry such as gold, platinum, palladium, silver, rhodium, copper, zinc, nickel, etc. in the form of spectra And its proportions.


The analysis method of the precious metal detector is that an X-ray detector with a certain energy resolution simultaneously detects various energy characteristic X-rays emitted by the sample. The detector output signal amplitude is proportional to the received X-ray energy, using an energy spectrometer Analyze the energy size and intensity of the output signal of the detector, and perform quantitative and qualitative analysis of the sample


EDX-8000Max is not only equipped with the most advanced SDD detector on the market, but also the super-large sample chamber can meet the test of various large-size samples without disassembling or destroying the samples. The characteristics of 8000Max make it the best choice for gold and jewelry testing.


Application industry: composition analysis of precious metals and alloys, rapid identification of gold K value (4k-24K), rapid distinction of thousand pure gold and universal gold, authenticity testing of gold jewelry, watches and coins, dental alloy analysis, coating thickness analysis, electroplating solution Metal element content analysis


Features


Complete non-destructive testing: the tested metal is not damaged in any way, regardless of its appearance, internal quality or weight


Wide test range: all kinds of gold, platinum and other precious metal alloys can be measured


Fast test speed: According to the measurement requirements, the measurement results can be obtained within 30 seconds to 200 seconds


High measurement accuracy: the measurement error is ±0.1% for pure gold,


Provides a spectral line overlap comparison tool, which is convenient for users to find out the peaks of unknown elements


What is the K value of gold?

The weight of gold is measured in troy ounces (1 troy ounce = 31.1034768 grams), and the purity is expressed in "K" (K). The "K" of K gold is the preparation of the foreign word "Karat", the complete representation: Karat gold (K gold), "AU" or "G" is the symbol used internationally to express the purity of gold (that is, the amount of gold) .


"K purity" measures the purity of gold in gold and other metal alloys. 24K means pure gold, no other metals are mixed. A low K value means less gold; 18K gold contains 75% gold, and 25% is other metals, usually copper or silver.


Countries have different requirements for the minimum K value that an object should be called a gold piece. In the United States, 10K is the legal minimum acceptable standard for gold purity, and 14K is the most common. In France, the United Kingdom, Austria, Portugal and Ireland, 9K is the minimum purity allowed to be called gold. In Denmark and Greece, 8K is the legal minimum standard.



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