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3.4.3. Testing Principle of Magnesium Content

KY Ke Yuan
SH Siqi He
BY Bo Yu
SQ Shiyi Qian
XW Xueyu Wu
WL Wenyi Li
CZ Chunmeng Zhao
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The interfering elements such as manganese, iron, aluminum, titanium, and vanadium were separated by C6H12N4 and (C2H5)2NCS2Na·3H2O. The content of calcium was titrated with the standard solution of EDTA in pH ≥ 12 using calcein as an indicator, and the combined content of calcium and magnesium was titrated with the standard titration solution of EDTA in pH = 10 with eriochrome black T as an indicator. The content of magnesium in the solution was calculated according to the combined content of calcium and magnesium and the content of calcium (GB/T 1511-2016) [43].

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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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