体彩超级大乐透连号分布图

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当前位置:光纤光谱仪公司 > 行业动态 > 光谱测色仪的光度标尺
光谱测色仪的光度标尺
添加时间:2018-04-28


 

标准玻璃滤光片谱图

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  1. BIAOZHUNBOLILVGUANGPIAN

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标准溶液谱图


2.BIAOZHUNRONGYE


用仪器分析液体样品时,是将样品放入比色皿内进行的。液体标准物质有利于消除测量中比色皿带入的误差。标准溶液的缺点是制备复杂,标准数值不易复现,使用时还须注意温度修正,光谱中性和长期稳定性都不如固体滤光片。因此,现在检验仪器的光度标尺多用固体标准物质而不用溶液标准物质用于(紫外)可见光谱区的溶液标准物质有钻盐和镍盐的混合溶液,如美国的SRM931b。也有配制成三种不同的浓度,给出特定波长下吸光度值的高纯度金属混合溶液,这种标准溶液由国家标准物质研究中心研制发放。