Pretreatment method and pretreatment system for detecting radium content in liquid

• Main Authors: WANG HONGLU, XIE LINGTAO, ZHANG YUZHEN, BIAN BAOLI, HUANG ZHENPENG, WANG HAI, CAO RUI, ZHENG RUNWU, FU FAMING, LI JUAN, LI QING, WANG HONGWEI, CHEN SHIHENG, LYU HONGZHEN, LI DAN
• Format: Patent
• Language: Chinese; English
• Published: 01.03.2022
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASUREMENT OF NUCLEAR OR X-RADIATION; MEASURING; PHYSICS; TESTING

The invention relates to a pretreatment method for detecting radium content in liquid, which comprises the following steps: measuring the hardness of a liquid sample to be detected, feeding back a measurement result X to a central control unit, calculating the dosage V of EDTA-2Na required to be added according to a pre-stored dosage calculation formula of EDTA-2Na, heating and stirring the liquid sample to be detected, and calculating the radium content of the liquid sample to be detected according to the dosage V of the EDTA-2Na required to be added. Sequentially adding a predetermined amount of barium chloride solution and sulfuric acid solution into the sample; standing the tested sample to obtain barium sulfate radium precipitate, removing supernate, leaving a small amount of tested sample and precipitate, adding an EDTA-2Na solution with the dosage of V into the tested sample and precipitate, and heating until the precipitate is completely dissolved; according to the pretreatment method for detecting th