Tetrahydrofuran (THF) is a widely used mobile phase in organic solvent-based size exclusion chromatography (SEC) due to its excellent solubility for a broad range of polymeric materials. In recent years, growing interest in green chemistry has driven the search for […]

Polystyrene (Mp 580) was analyzed using GPC HK-406, an organic SEC (GPC) column for ultra-rapid analysis. Different numbers of HK-401 columns (1, 2, and 3 units) were used alone/together in series to compare their separation efficiencies. The use of multiple […]

GPC HK-400 series, organic SEC (GPC) columns for ultra-rapid analysis have low column pressure even at high flow rates and can be used in conventional HPLC devices. The separation of epoxy resin (jER1001) using HK-402 was compared at flow rates […]

The GENERAL CHAPTERS of the United States Pharmacopeia and the National Formulary (USP-NF 2023 ISSUE 3*) includes “<314> Molecular Weight Determination for Copolymers Containing Alkyl Methacrylate or Alkyl Acrylate”. The method for “apparent weight-average molecular weight and polydispersity” measurement is […]

Glyceryl distearate is a type of emulsifier and is widely used mainly in pharmaceuticals and cosmetics. According to the United States Pharmacopeia and the National Formulary (USP 43-NF 38*), “ASSAY” for “Glyceryl Distearate” should be carried out with a 7.5 […]

Glyceryl stearate is a type of emulsifier and is widely used mainly in pharmaceuticals and cosmetics. According to the United States Pharmacopeia and the National Formulary (USP 43-NF 38*), “ASSAY” for “Glyceryl Stearate” should be carried out with a 7.5 […]

Glyceryl tristearate is a type of emulsifier and is widely used mainly in pharmaceuticals and cosmetics. According to the United States Pharmacopeia and the National Formulary (USP 43-NF 38*), “ASSAY” for “Glyceryl Tristearate” should be carried out with a 7.5 […]

Polystyrene standards were analyzed using GPC HK-401, an organic SEC (GPC) column for ultra-rapid analysis. The RI chromatograms showed that the benzene peak overlapped with the eluent-related negative peak. RI Sample : 0.5 % each, 5 µL 1. Polystyrene (Mp: […]

Polystyrene standards were analyzed using GPC HK-403, an organic SEC (GPC) column for ultra-rapid analysis. The RI chromatograms showed that n-propylbenzene and benzene peaks overlapped with eluent-related negative peaks. RI Sample : 0.5 % each, 5 µL 1. Polystyrene (Mp: […]

Polystyrene standards were analyzed using GPC HK-406, an organic SEC (GPC) column for ultra-rapid analysis. Comparing the separation between an HK-406 with a conventional SEC column of equivalent at the flow rate of 1.0 mL/min, HK-406 achieved the same level […]