CTI provides textile/toy/leather content analysis services related to quality control samples, which are mainly used for method verification and confirmation, quality assurance of the testing process, etc., and can be used for on-site review, supervisory review, re-assessment and unannounced inspection by regulatory agencies. Samples can also be used for accusation samples or blind samples such as laboratory internal audit, daily quality supervision, quality assessment, personnel assessment, method comparison, personnel comparison, and equipment comparison.