聚苯乙烯; 窄分布聚苯乙烯分子量标准物质; 浸渍聚苯乙烯; 聚苯乙烯(PS); 聚苯乙烯微球; POLYSTYRENE STANDARD 2'000 CERTIFIED &;POLYSTYRENE, BEADS, AVERAGE DIAMETER 0.4 6UM, 10 WT. % DISPERSION IN WATER;MALDI VALIDATION SET POLYSTYRENE MP 500- 70000 CERTIFIED;POLYSTYRENE STANDARD 200'000;Polystyrene standard, for GPC, typical MW 2,000,000;Polystyrene standard, for GPC, typical MW 4,000;POLYSTYRENE STANDARD 650000 CERTIFIED AC C. TO DIN;Polystyrene standard, for GPC, typical MW 50,000
