质量标准: | 硫酸钡 CAS:7727-43-7 GB/T1269-77 项目ltem 分析纯 化学纯 (AR) (CP) 盐酸可溶物Soluble in hydrochloric acid ≤ 0.15 0.25 灼烧失重Loss on ignition,% ≤ 1.5 1.5 氯化物(Cl)Chloride,% ≤ 0.005 0.02 可溶性硫酸盐(以SO4计)Soluble sulfate,% ≤ 0.005 0.03 氮化合物(N)Nitrogen compounds,% ≤ 0.005 0.01 铁(Fe)Iron,% ≤ 0.0005 0.001 砷(As)Arsenic,% ≤ 0.0001 0.001 可溶性的钡盐(以Ba计)Soluble barium salt,% ≤ 0.0001 0.0005 重金属(以Pb计)Heavy metals,% ≤ 0.0005 0.001 超细硫酸钡: BaSO4纯度Purity ≥99.0% 挥发物Volatile matter 0.2% (105℃) PH值 7-9 亮度brightness 99 平均粒径particle size 1μm 密度Density g/ml 4.4 折射指数Refractive index 1.64 筛余screen floating 〈0.004% 硫酸钡 CAS:7727-43-7 品级Grade 沉淀硫酸钡 (precipitated, powder) loss on ignition ≤2% particle size 2.4-4.8 μm chloride (Cl-): ≤1000 ppm Ca: ≤1000 ppm Cd: ≤50 ppm Co: ≤50 ppm Cu: ≤50 ppm Fe: ≤50 ppm K: ≤100 ppm Na: ≤1000 ppm Ni: ≤50 ppm Pb: ≤50 ppm Zn: ≤500 ppm 品级Grade 美国药典USP级 (USP) 鉴别试验IDENTITY PASS PH TEST 3.5 - 10.0 硫化物LIMIT OF SULFIDE ≤ 0.5 PPM 酸溶性物质LIMIT OF ACID-SOLUBLE SUBSTANCE ≤ 0.3% 可溶性钡盐LIMIT OF SOLUBLE BARIUM SALTS ≤ 0.001% 重金属HEAVY METALS ≤ 0.001% 残留溶剂RESIDUAL SOLVENTS MEETS THE REQUIREMENTS 含量ASSAY 97.5% ~ 100.5% 硫酸钡 CAS:7727-43-7 USP级 ASSAY 97.5 - 100.5 % pH OF AN AQUEOUS SUSPENSION 3.5 - 10.0 SULFIDE (S) -- 0.5 ug/g ACID-SOLUBLE SUBSTANCES -- 0.3 % SOLUBLE BARIUM SALTS -- 0.001 % HEAVY METALS (as Pb) -- 0.001 % |