Fire assay is an established and proven method for testing the purity
of gold jewelry and other objects. Nevertheless, it is a destructive and time-consuming process requiring the use of hazardous chemicals. X-ray fluorescence has emerged as a non-destructive alternative to the fire assay method, with comparable accuracy in just minutes. XRF instrumentation is now available in portable units ideally suited for countertop use in retail environments for accurate testing of any precious metal. In a test against two different refineries using fire assay to evaluate two gold ingots from the same melt, an XRF analyzer provided results just as accurate as one refinery, and even more accurate than the second refinery. The test results provided in this article were performed using the Thermo Scientific? Niton? DXL Precious Metal Analyzer. 尼通(NITON)XL5手持式合金分析仪
Variations of the filler structure can have a drastic
introduction There is currently a wide range of pe
CEM SPRINT真蛋白质分析仪是快速测量食品宠物食品等总的真蛋白质含量的一项新技术它采用的是运用在生物科
利用 MSQ 质谱检测器,正离子模式下,可以有效检测矮壮素,灵敏度高,zui低浓度 0.05ppm 可以有效检出。在
加铝Z近对粒度分析仪进行了评估,该粒度分析仪基于计数而不是从
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运用Vanquish Core HPLC液相系统可以重现水质草甘膦的测定标准方法,样品 空白对草甘膦检测无干扰。 •
实验室对于优质乳工程要求的几大指标如乳铁蛋白,免疫球蛋白,乳过氧化物酶以及糠氨酸等的检测均采用快检试剂盒加上
介绍蛋白质在湿宠物食品和干宠物食品的生产过程中起着重要作用。蛋白质的质量和数量不仅影响生产的总成本,还影响消