Back
Knowledge

Pulp, paper and paperboard - Determination of magnesium content

Abstract: 本文介绍了测定纸浆、纸和纸板中镁含量的原子吸收光谱法。首先，样品需与浓盐酸和硝酸反应，完全溶解后用去离子水稀释成样品溶液。然后，调整和预热原子吸收光谱仪，并使用已知浓度的镁标准溶液进行校准。最后，将样品溶液注入仪器，通过吸光度值和校准曲线计算镁含量。文章提醒在样品制备过程中确保试剂和仪器的洁净，以避免测量结果的干扰。

Magnesium content in pulp, paper and board can be determined by atomic absorption spectrometry as follows:

  1. Sample preparation: Take a certain amount of pulp, paper or cardboard sample, add appropriate amount of concentrated hydrochloric acid and nitric acid, let it stand for a period of time to completely dissolve, add deionized water to dilute to a certain volume, and then the sample solution is obtained.

  2. Instrument adjustment: turn on the atomic absorption spectrometer, adjust and preheat according to the instrument manual.

  3. Calibration: Calibrate with a magnesium standard solution of known concentration.

  4. Determination: inject the sample solution into the atomic absorption spectrometer for determination, and calculate the magnesium content in the sample according to the absorbance value displayed by the instrument and the calibration curve.

NBCHAO reminds you: During the sample preparation process, keep all reagents and glass instruments clean and dry, so as not to interfere with the measurement results.

Products required
Relevant knowledge