In analytical chemistry, ashing or ash content determination is the process of mineralization by complete combustion for preconcentration of trace substances prior to a chemical analysis, [1] such as chromatography, or optical analysis, such as spectroscopy.

总灰分是把一定量的样品经炭化后放入高温炉内灼烧，使有机物质被氧化分解，以二氧化碳、氮的氧化物及水等形式逸出，而无机物质以硫酸盐、磷酸盐、碳酸盐、氯化物等无机盐和金属氧化物的形式残留下来，这些残留物即为灰分。 称量残留物的重量和样品重量，两者的比值即为样品中总灰 …

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2018年5月25日 · Calculate the percentage of acid-insoluble ash on the dried drug basis. Place the ash (Method A or B), or the sulphated ash, as directed in the individual monograph, in a crucible, add 15 ml of water and 10 ml of hydrochloric acid, cover with a watch glass, boil for 10 minutes, and allow to cool.

2023年5月8日 · Sulphated Ash Testing is used to determine the amount of sulfated ash forming metallic constituents in unused lubricating oils and additives. Total Ash Testing determines the total amount of inorganic matter or ash present in a material.

Determine the percentage of acid-insoluble ash calculated from the weight of drug taken. Boil the ash obtained as directed for Total Ash with 25 mL of water for 5 minutes. Collect the insoluble matter in a sintered-glass crucible or on an ashless filter paper. Wash with hot water, and ignite for 15 minutes at a temperature not exceeding 450.

在高温灼烧时，食品发生一系列物理和化学变化，最后有机成分挥发逸散，而无机成分（主要是 无机盐 和 氧化物）则残留下来，这些残留物称为 灰分，它是标示食品中无机成分总量的一项指标。 试样经干燥、炭化、灰化、冷却后，称量残留物的质量。 （1）水：符合GB/T 6682-1992规定的三级水。 （2）30% 过氧化氢：分析纯。 实验室常规仪器及下列仪器。 （1）机械设备：用于试样的均质化，包括高速旋转的切割机，或多孔板的孔径不超过4mm的绞肉机。 （2）坩埚：平底， …

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本标准规定了油料饼粕（复合产物除外）中总灰分含量测定的原理、试剂、仪器和器具、分析步骤以及结果计算。 本标准适用于经压榨法或浸出法提取油脂后的油料饼粕（复合产物除外）。 食品产业链内部商城，满足食品行业需求。 食品伙伴网提供标准法规解读、舆情监控、合规咨询、申报注册等服务。 电询0535-2129301. 本标准来自网友分享，只作为食品技术同行的交流学习之用，请在下载后24小时内删除，勿作他用。 工作使用请购买正式出版标准。 食品伙伴网下载中心属 …