高錳酸鉀滴定法測定硫酸氧釩干基
發(fā)布時間:2019-06-26 14:00
【摘要】:通過對硫酸氧釩的熱重和差熱分析,確定了硫酸氧釩的干燥條件,即干燥溫度為300℃,真空干燥時間為70min。在此干燥條件下,可使硫酸氧釩完全失掉結(jié)晶水,得到干燥的硫酸氧釩樣品。在7.5%~10%(V/V)硫酸介質(zhì)中,采用高錳酸鉀滴定法測定干燥的硫酸氧釩中釩(Ⅳ)含量,經(jīng)換算得到硫酸氧釩干基。方法用于硫酸氧釩干基的測定,結(jié)果的相對標(biāo)準(zhǔn)偏差(RSD,n=11)為0.16%,按照實(shí)驗(yàn)方法測定基準(zhǔn)硫酸氧釩干基(硫酸氧釩干基質(zhì)量分?jǐn)?shù)大于99.5%),測定值為99.86%。
[Abstract]:The drying conditions of vanadium sulfate were determined by thermogravimetric and differential thermal analysis, that is, the drying temperature was 300 鈩,
本文編號:2506236
[Abstract]:The drying conditions of vanadium sulfate were determined by thermogravimetric and differential thermal analysis, that is, the drying temperature was 300 鈩,
本文編號:2506236
本文鏈接:http://www.sikaile.net/kejilunwen/huaxuehuagong/2506236.html
最近更新
教材專著