The sample is dissolved in nitric and fluoric-hydro acid adding sulfuric acid, and heating up to fuming, then the matrix element titanium is separated with sodium hydroxide.
试样用硝酸—氢氟酸溶解，硫酸冒烟后强碱分离钛、铁、镍离子，其余干扰离子用酒石酸钾钠掩蔽。
2
According to the trait of rocket propellant a kind of protective gloves made of composite fluorine rubber is developed which can be used to protect the skin of red fuming nitric acid worker.
The PS water reducing agent, which is very effective for concrete, has been made from waste poly styrene(WPS) by sulfuric acid of fuming sulfuric acid sulfonation process.