Certificate of Analysis

Chlorite &Chlorate QC CRM

Catalog Number:COC-082

Expiration: 10/31/2022 
Lot Number: D1020

Solvent: Water 
Hazards: Irritant
                                      Study                                      Certified                                 Acceptance 
Analyte                          Mean                                  Concentration                                  Limits 
                                      (ug/L)                                       (ug/L)                                          (ug/L) 
Chlorate                         144                                       134±0.615                                   93.8-174 
Chlorite                           841                                       841士3.86                                   589-1090

This quality control CRM was manufactured by NSI Lab Solutions following quality procedures meeting the
requirements of ISO 9001,ISO 17025,and ISO 17034.Acceptance limits are set at current NELAC standards.The study mean is set at the mean of an interiaboratory proficiency testing study with outlier rejection. This CRM is intended to be used tovalidate analytical methods,for detection limit studies,and analyst proficiency testing

Storage & instructions For Use

The unopened ampule can be stored at room temperature(15-30°C) Fill a 1000 mL Class A volumetric flask with 900mLof reagent water. Pipet exactly 1.0 mL of the concentrate from the ampule into the flask Bring the flask to volume with reagent water and mix well. This represents the sample for analysis.

Traceability Information

Analvte Source Materials: The highest purity analyte source materials are used in the manufacture of this CRM Analyte source material purity and associated uncertainty has been analytically verified against appropriate NIST SRMswhere available.
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.
All balances are checked daily by an in-house standard operating procedure.The weights used for this daily
verification are calibrated annually by an ISO 17025 accredited calibration laboratory and are certified traceable to NISTCertificate of Calibration and Traceability available upon request.
Thermometer: All thermometers are NIST traceable through thermometers that are calibrated annually by an ISO17025 accredited calibration laboratory.
Glassware: All glassware used in the manufacture of our samples is Class A.An in-house standard operating
procedure is used to verify all glassware prior to it being placed into service.Volumetric pipetors are calibrated every four months by an ISO 17025 accredited calibration laboratory

Catalog Number:CQC-082

Lot Number: D1020

Uncertainty

The+uncertainty associated with the certified concentration is the expanded uncertainty at 95% confidence interval(Cl)with K=2.This expanded uncertainty incorporates contributions from manufacturing.homogeneity, and stability.

Homogeneity

This quality control CRM was thoroughlymixed in production.Batch homoaeneity was established throuah analvses of samples chosen at random

Stability/Expiration

The stability of this quality control CRM is based on short-term and long-term monitoring of the certified concentration. The expiration date is guaranteed to be valid from the manufacture date and is based on results of long-term monitoring.Guarantee is applicable to the unopened ampule.

注：证书信息仅供参考，以产品附带证书为准。