Certificate of Analysis

5 Acids in Soil QC

Catalog Number：SCQC-228

Matrix：Soil

Hazards：Irritant

Analyte	CAS	Analyte Purity	Gravimetric  Concentration (mg/kg)	Acceptance Limits(mg/kg)
m-Cresol（3-甲基苯酚/间甲酚）	108-39-4	99.90%	6.89±0.06	4.13-9.64
o-Cresol（2-甲基苯酚/邻甲酚）	95-48-7	99.60%	6.87±0.06	4.12-9.61
p-Cresol（4-甲基苯酚/对甲酚）	106-44-5	99.80%	6.63±0.06	3.98-9.28
Pentachlorophenol（五氯苯酚五氯酚）	87-86-5	96.80%	6.58±0.06	3.95-9.22
Phenol（苯酚）	108-95-2	99.90%	6.90±0.06	4.14-9.66

This certified reference material (CRM) was manufactured and certified by NSI Lab Solutions according to quality procedures meeting our accreditation requirements of ISO 17034:2016 and ISO/IEC 17025:2017. Our certificates and scopes of accreditation may be viewed at www.anab.org.

Packaging, Storage, Instructions For Use

This CRM is packaged in a sealed container and must be stored at 2°C to 8°C. To use this CRM, allow it to reach room temperature.

This sample has been designed to be totally used. Do not subsample since intra-sample homogeniety cannot be assured. Transfer the entire contents of the sample vial and rinse the vial with 2 small aliquots of extraction solvent adding rinseates to the extraction vessel. Complete the analysis according to your normal procedures.

Report results in units of mg/kg based on a 30 g sample size.  No dry weight correction is needed.

Certified concentration is based upon the gravimetric/volumetric true value when prepared according to instructions. Acceptance limits are based upon USEPA solid and chemical Interlaboratory studies.

Traceability Information

Analyte Source Materials: The highest purity analyte source materials are used in the manufacture of this standard. The actual purity is referenced above.

Method: This CRM was verified Volumetrically/Gravimetrically

Balance: All analytical balances are calibrated on a semiannual basis by an ISO 17025 accredited calibration laboratory and are traceable to NIST. Traceable Calibration Certificate available upon request.