甲醛/甲醛标准溶液,50-00-0,Formaldehyde solution

甲醛/甲醛标准溶液

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ACS级
项目名称　                                   ACS Grade
含量（HCHO）Assay                             36.5-38.0%
色度，黑曾单位Color（APHA）                 ≤  10
灼烧残渣Residue after ignition            ≤  0.005%
可滴定酸 Titrable acid                    ≤  0.006meq/g
氯化物（Cl） Chloride                       ≤  5ppm
硫酸盐（SO4） Sulfate                       ≤  0.002%
重金属（以Pb计）Heavy metals（as Pb）         ≤  5ppm
铁（Fe）Iron（Fe）                            ≤  5ppm

品级Grade                               分子生物学级  
                                   （for molecular biology，36.5-38% in H2O）  
浓度concentration                        ≥36.0% in H2O （T）
游离酸free acid （as HCOOH）               ≤0.03%
灼烧残渣Residue on ignition              ≤0.05% （as SO4）
氯chloride （Cl-）:                        ≤10 ppm
硫酸根sulfate （SO42-）:                   ≤20 ppm
cation traces by ICP Atomic emission
  Ca:                                    ≤5 ppm
  Cd:                                    ≤1 ppm
  Co:                                    ≤1 ppm
  Cr:                                    ≤1 ppm
  Cu:                                    ≤1 ppm
  Fe:                                    ≤1 ppm
  K:                                    ≤20 ppm
  Mg:                                    ≤1 ppm
  Mn:                                    ≤1 ppm
  Na:                                    ≤100 ppm
  Ni:                                    ≤1 ppm
  Pb:                                    ≤1 ppm
  Zn:                                    ≤1 mg/mL
λ 2 M in H2O
UV absorption
  λ: 260 nm A:                           ≤0.01
  λ: 280 nm A:                           ≤0.01
Test for electrophoresis of RNA in agarose gels  Pass
稳定剂stabilizer                         ~10% methanol