1. Scope

1.1 This standard covers a practice for the determination of hydroxyl numbers of polyols using NIR spectroscopy.

1.2 Definitions, terms, and calibration techniques are described. Procedures for selecting samples, and collecting and treating data for developing NIR calibrations are outlined. Criteria for building, evaluating, and validating the NIR calibration model are also described. Finally, the procedure for sample handling, data gathering and evaluation are described.

1.3 The implemenation of this standard requires that the NIR spectrometer has been installed in compliance with the manufacturer's specifications.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Note 1-There is no equivalent or similar ISO standard.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D883 Terminology Relating to Plastics

D4274 Test Methods for Testing Polyurethane Raw Materials: Determination of Hydroxyl Numbers of Polyols

D4855 Practice for Comparing Test Methods

E131 Terminology Relating to Molecular Spectroscopy

E168 Practices for General Techniques of Infrared Quantitative Analysis

E222 Test Methods for Hydroxyl Groups Using Acetic Anhydride Acetylation

E275 Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers

E456 Terminology Relating to Quality and Statistics

E1655 Practices for Infrared Multivariate Quantitative Analysis

E1899 Test Method for Hydroxyl Groups Using Reaction with p-Toluenesulfonyl Isocyanate (TSI) and Potentiometric Titration with Tetrabutylammonium Hydroxide

ISO Standard

Keywords

chemometrics; hydroxyl number; MLR; multivariate analysis; near-infrared analysis; NIR; PCR. PLS; polyol; polyurethane; raw material;

ICS Code

ICS Number Code 83.040.10 (Latex and raw rubber)

DOI: 10.1520/D6342-98

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