Open AccessAn analytical method for the determination of molybdenum in the end fitting of PE flexible composite pipe
Author(s) -
Xiaodong Shao
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/612/2/022090
Subject(s) - molybdenum , thiocyanate , absorbance , sulfuric acid , composite number , phosphoric acid , materials science , perchloric acid , inorganic chemistry , chemistry , metallurgy , composite material , chromatography
The flexible composite pipe is a new type of polymer composite pipe with excellent corrosion resistance. Based on the color reaction of molybdenum with sodium thiocyanate, a photometric method for the determination of molybdenum in flexible composite pipe joint samples was established. The sample is dissolved by a sulfuric acid-phosphoric acid mixed acid, and stannous chloride is used as a reducing agent in a sulfuric acid-perchloric acid medium, and an orange-red complex is formed between molybdenum and sodium thiocyanate, and the absorbance, absorbance and molybdenum content are measured in mass. The linear relationship is in the range of 0.30%∼1.18%. This method uses a standard steel solution closer to the real sample to establish a working curve. The experiment shows that the method is accurate and simple. The molybdenum in the end fitting of flexible composite pipe was measured, and the results were satisfactory.