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Pulp, paper and paperboard - Determination of iron content

Abstract: 本文介绍了纸浆、纸和纸板中铁含量的测定方法，包括原子吸收光谱法（AAS）和感应耦合等离子体质谱法（ICP-MS）。样品需经过消解和溶解处理。使用AAS时，通过特定波长光线照射样品，检测铁原子的共振吸收来计算含量；使用ICP-MS时，通过高温等离子体将样品离子化，检测离子流的强度变化来计算铁含量。文章提醒在实验过程中需注意实验室卫生、安全及操作规范。

Iron content in pulp, paper and board can be determined by atomic absorption spectroscopy (AAS) or inductively coupled plasma mass spectrometry (ICP-MS).

Specific steps are as follows:

  1. Sample preparation: take a certain amount of sample, add certain reagents, such as nitric acid, sodium hydroxide, etc., for digestion and dissolution.

  2. Determination by atomic absorption spectrometry:

  3. Put the sample solution into the atomic absorption spectrometer, and irradiate the sample with light of specific wavelengths such as sodium lamps and magnesium lamps, so that the iron atoms in the sample produce resonance absorption.

  4. By detecting the intensity change of the resonantly absorbed light, the iron content in the sample is calculated.

  5. Inductively Coupled Plasma Mass Spectrometry Determination:

  6. Put the sample solution into an inductively coupled plasma mass spectrometer, and use high-temperature plasma to ionize the elements in the sample.

  7. By detecting the intensity change of the ion current, the iron content in the sample is calculated.

NBCHAO reminds you: when performing sample preparation and testing, pay attention to laboratory hygiene and safety, and strictly abide by the experimental operation specifications and operating procedures.

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