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:
Sample preparation: take a certain amount of sample, add certain reagents, such as nitric acid, sodium hydroxide, etc., for digestion and dissolution.
Determination by atomic absorption spectrometry:
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.
By detecting the intensity change of the resonantly absorbed light, the iron content in the sample is calculated.
Inductively Coupled Plasma Mass Spectrometry Determination:
Put the sample solution into an inductively coupled plasma mass spectrometer, and use high-temperature plasma to ionize the elements in the sample.
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.
