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公开(公告)号：US5216483A
公开(公告)日：1993-06-01
申请号：US763712
申请日：1991-09-23
CPC分类号： G01N21/6408 , D21C7/12 , G01N33/343
摘要： A method and apparatus for measuring lignin concentration in a sample of wood pulp or black liquor comprises a light emitting arrangement for emitting an excitation light through optical fiber bundles into a probe which has an undiluted sensing end facing the sample. The excitation light causes the lignin concentration to produce fluorescent emission light which is then conveyed through the probe to analyzing equipment which measures the intensity of the emission light. Measures aThis invention was made with Government support under Contract Number DOE: DE-FC05-90CE40905 awarded by the Department of Energy (DOE). The Government has certain rights in this invention.
摘要翻译： 用于测量木浆或黑液样品中的木质素浓度的方法和装置包括用于通过光纤束将激发光发射到具有未被稀释的感测端面向样品的探针的发光装置。 激发光使木质素浓度产生荧光发射光，然后将荧光发射光通过探针传送到测量发射光强度的分析设备。 采取措施来最大化由木质素浓度引起的发射光强度，并将其与背景和干扰光区分开来。 发现荧光强度随着木质素浓度增加而以可预测的方式下降。
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公开(公告)号：US5220172A
公开(公告)日：1993-06-15
申请号：US763837
申请日：1991-09-23
CPC分类号： G01N21/6408 , G01N21/645 , G01N2021/6432 , G01N21/85 , G01N2201/084
摘要： A method and appartus for measuring lignin concentration in an undiluted sample of wood pulp or black liquor comprises a light emitting arrangement for emitting an excitation light through optical fiber bundles into a probe which has a sensing end facing the sample. The excitation light causes the lignin concentration to produce fluorescent emission light which is then conveyed through the probe to analyzing equipment which measures the intensity of the emission light. Measures are taken to maximize the emission light intensity which is due to lignin concentration and distinguish it from background and interfering light. The fluorescent light intensity is found to drop off in a predictable manner with increased lignin concentration.
摘要翻译： 用于测量未经稀释的木浆或黑液样品中的木质素浓度的方法和装置包括用于通过光纤束将激发光发射到具有面向样品的感测端的探针的发光装置。 激发光使木质素浓度产生荧光发射光，然后将荧光发射光通过探针传送到测量发射光强度的分析设备。 采取措施来最大化由木质素浓度引起的发射光强度，并将其与背景和干扰光区分开来。 发现荧光强度随着木质素浓度增加而以可预测的方式下降。
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3.发明授权
公开(公告)号：US5486915A
公开(公告)日：1996-01-23
申请号：US226801
申请日：1994-04-12
CPC分类号： G01N21/85 , D21C7/12 , G01N21/64 , G01N2021/6417 , G01N2021/6421 , G01N2021/6484
摘要： Lignin concentrations from wood pulp samples are measured by applying an excitation light at a selected wavelength to the samples in order to cause the lignin to emit fluorescence. A spectral distribution of the fluorescence emission is then determined. The lignin concentration is then calculated based on the spectral distribution signal. The spectral distribution is quantified by either a wavelength centroid method or a band ratio method.
摘要翻译： 木浆样品中的木质素浓度通过将所选波长的激发光施加到样品来测量，以使木质素发射荧光。 然后测定荧光发射的光谱分布。 然后基于光谱分布信号计算木质素浓度。 光谱分布通过波长中心方法或带比法进行量化。
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