whatman硬化无灰定量滤纸GRADE 540 1540-055 1540-090 1540-110 1540-125 1540-150whatman硬化无灰定量滤纸GRADE 5401540-321 1540-324 1540-042 1540-055 1540-090 1540-110 1540-125 1540-150 1540-070 1540-185 1540-240 8μm常规过滤用硬化无灰定量滤纸,灰分小于0.008%,中等流速,常用于酸性或碱性溶液中金属物质的比重分析
The general purpose hardened ashless filter paper with medium retention and flow rate. Extremely pure and strong with a hard surface. High chemical resistance to strong acid and alkali. Frequently used in the gravimetric analysis of metals in acid/alkali solutions and in collecting hydroxides after precipitation by strong alkalis