Web23 Apr 2015 · THF is known to damage PEEK tubings. However, using small concentrations of THF as eluent modifier is safe. We have been using an eluent mixture with 2% THF … Webhplc(高速液体クロマトグラフ)用溶媒は、水分、過酸化物、不揮発性不純物による屈折率の変化や、さらに紫外吸光、蛍光物質などについて品質保証した、高純度な溶媒です。
络氨酸-聚乙二醇-大环配体 tyrosine-PEG-PCTA-西安齐岳生物
Web20 Mar 2024 · THF can be used ( chromatography grade try Merck) in 20% concentration level provided the solubility of THF in water should be taken care of . Stir and sonicate properly in water. Secondly... Web精密分析用試薬; 吸収スペクトル用試薬; 有害金属分析用試薬; 原子吸光分析用試薬; 蛍光分析用試薬; 原子吸光用金属標準液; 元素分析用試薬; 標準物質; 容量分析用規定液; 非水滴定用試薬; 指示薬溶液; ぬれ張力試験液; pH測定用試薬; pH標準液; 残留塩素測定 ... exercises for sore elbow
Tetrahydrofuran inhibitor-free, suitable for HPLC, ≥99.9% 109
WebTetrahydrofuran suitable for HPLC, ≥99.9%, inhibitor-free; CAS Number: 109-99-9; EC Number: 203-726-8; Synonyms: Butylene oxide,Oxolane,Tetramethylene oxide; find Sigma-Aldrich-439215 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich ... Tetrahydrofuran (THF) is a saturated cyclic ether with a ... Web一般而言,市面上买来的质量较好的HPLC级别溶剂中,THF含水量为100ppm,甲苯为200ppm,二氯甲烷为20ppm。 以THF为例,如果使用最经典的加入钠丝加热回流除水,以二苯甲酮作为指示剂,煮到指示剂变蓝,收集得到的“超干”THF,含水量是43ppm。 但是如果单纯在市售THF中加入10%(质量/体积分数)的3A分子筛,等待24小时,含水量就可以降 … Web1. THF is highly flammable and should be used in combination with an aqueous solvent if possible. Particular care should be exercised when using THF with APCI due to the … exercises for someone with bad knees