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NG28 provides chemical analysis services for hazardous substances related to quality control samples, which are mainly used for method verification and confirmation, quality assurance of the testing process, etc., which can be used for blind samples for on-site review, supervisory review, re-assessment and unannounced inspections by regulatory agencies. Charge samples or blind samples used for laboratory internal audit, daily quality supervision, quality assessment, personnel assessment, method comparison, personnel comparison, equipment comparison, etc.

NG28 provides leather heavy metal chemical analysis services related to measurement audit. Measurement audit: An activity in which a participant performs an actual test on the tested item and compares the test result with a reference value. Note: Measurement audit is a proficiency testing plan that conducts a "one-to-one" ability evaluation of a participant

NG28 provides leather physical characteristics testing services related to measurement audits. Measurement audit: an activity in which a participant performs actual tests on the tested items and compares the test results with reference values. Note: Measurement audit is a proficiency testing plan that conducts a "one-to-one" ability evaluation of a participant

NG28 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.

NG28 provides textile/toy/leather combustion performance testing services related to quality control samples, which are mainly used for method verification and confirmation, quality assurance of the testing process, etc., which can be used for on-site review, supervisory review, reassessment and unannounced inspections by regulatory agencies Blind 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.

NG28 provides chemical analysis services for textile/toy/leather prohibited substances related to quality control samples, which are mainly used for method verification and confirmation, quality assurance of the testing process, etc., which can be used for on-site review, supervisory review, re-assessment and unannounced inspections by regulatory agencies The blind 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.