A LIGHT SCATTERING DETECTOR FOR THE SENSITIVE AND ACCURATE MEASUREMENT OF ABSOLUTE MOLECULAR WEIGHT OF SYNTHETIC AND NATURAL POLYMERS AND PROTEINS AS PART OF A GEL PERMEATION CHROMATOGRAPHY (GPC) OR SIZE EXCLUSION CHROMATOGRAPHY (SEC) EXPERIMENT. THE DETECTOR COMPRISES BOTH RIGHT-ANGLE (RALS) AND LOW-ANGLE (LALS) LIGHT SCATTERING ELEMENTS. THE RALS MAXIMIZES SENSITIVITY FOR THE MEASUREMENT OF LOW MOLECULAR WEIGHT MATERIALS, WHILE THE LALS MAXIMIZES THE ACCURACY OF THE MOLECULAR WEIGHT MEASUREMENTS FOR HIGH MOLECULAR WEIGHT SAMPLES. THE DETECTOR USES OPTICAL RADIATION.

CLASSIFICATION HAS BEEN DETERMINED IN ACCORDANCE WITH THE FOLLOWING:- GENERAL INTERPRETATIVE RULES (GIRS): GIR 1 HAS BEEN USED TO CLASSIFY THIS PRODUCT BY THE TERMS OF HEADING 9027 INSTRUMENTS AND APPARATUS FOR THE PHYSICAL OR CHEMICAL ANALYSIS (FOR EXAMPLE, POLARIMETERS, REFRACTOMETERS, SPECTROMETERS, GAS OR SMOKE ANALYSIS APPARATUS) ; INSTRUMENTS AND APPARATUS FOR MEASURING OR CHECKING VISCOSITY, POROSITY, EXPANSION, SURFACE TENSION OR THE LIKE; INSTRUMENTS AND APPARATUS FOR MEASURING OR CHECKING QUANTITIES OF HEAT, SOUND, OR LIGHT (INCLUDING EXPOSURE METERS); MICROTOMES: GIR 6 HAS BEEN USED TO CLASSIFY THE GOODS TO SUBHEADING LEVEL 902720 CHROMATOGRAPHS AND ELECTROPHORESIS INSTRUMENTS ALSO CLASSIFIED IN ACCORDANCE WITH:- HSEN NOTE 24 TO CHAPTER 9027