TOC Measurement Using Pre-Cleaned Vials

Introduction

Analysis of samples with low total organic carbon (TOC) concentrations, such ultrapure water and cleaning solutions, is conducted in many industrial fields, including drug and semiconductor manufacturing, and regular control of TOC values is necessary in order to confirm that water quality and equipment cleanliness satisfy the prescribed standards. When sampling water, even assuming the sample is clean, contamination may proceed due to organic compounds or carbon dioxide dissolving into the sample from the atmosphere or substances in contact with the water after sampling. As a result, the measured value will be higher than the actual value, and reanalysis may be required. Thus, countermeasures to prevent sample contamination are of the utmost importance when handling test materials with low TOC concentrations.

November 20, 2020 GMT