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NG28 provides atmospheric inorganic matter detection services related to measurement audits. Measurement audit: An activity in which a participant performs an actual test on the measured 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 atmospheric organic matter detection services related to measurement audits. 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 inspection services for inorganic substances in solid wastes related to measurement audits. Measurement audit: An activity where 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 simulated air heavy metal testing services related to measurement audits. Measurement audits: An activity where 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 water quality routine physical and chemical analysis 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 water quality pesticide residue chemical analysis services related to measurement audit. 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 water quality organic matter chemical analysis services related to measurement audits. Measurement audit: An activity where 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 water quality heavy metal chemical analysis services related to quality control samples, which are mainly used for method verification and confirmation, quality assurance of the test process, etc., and can be used for blind samples of regulatory agencies on-site review, supervisory review, reassessment, and unannounced inspections. 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 environmental soil chemical analysis services related to measurement audit. Measurement audit: An activity where 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 chemical analysis services for soil pesticide residues related to measurement audit. 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 chemical analysis services for heavy metals in soil 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 environmental microbiological testing services related to measurement audits. 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