1. Asbestos CRMs - KTR (Korea Testing & Research Institute) CategoryProduct Info.CRM No. Certified Value(%) Confidence Interval Description Capacity and Form Picture Building Materials Certified Reference Material Chrysotile (low conc.) 109-08-CH-0011.70.7~3.6 Th is Certified Reference Material is for quantitation analysis of Asbestos in building materials. by polarized light microscopy and, it can be used for visual estimation of polarized light microscopy analysis method and reliability assessment of the test result. 3g powder Chrysotile (medium conc.) 109-08-CH-0025.43.4~8.3 Chrysotile (high conc.) 109-08-CH-0039.66.7~13.0 Amosite (low conc.) 108-08-AM-0012.21.0~4.3 3g powder Amosite (medium conc.) 108-08-AM-00253.1~7.7 Amosite (high conc.) 108-08-AM-00310.57.6~14.2 Crocidolite (low conc.) 108-08-CR-0011.40.6~3.3 3g powder Crocidolite (medium conc.) 108-08-CR-0023.72.1~6.2 Crocidolite (high conc.) 108-08-CR-00374.7~10.1 Asbestos in soil Certified Reference Material Chrysotile in soil (low conc.) 109-08–CH-SOIL-0110.3~2.6 This Certified Reference Material is for quantitation analysis of Asbestos in soil by polarized light microscopy and, it can be used for visual estimation and point counting of polarized light microscopy analysis method and reliability assessment of the test result. 3g powder Chrysotile in soil (high conc.) 109-08-CH-SOIL–0242.3~6.5 Tremotile-asbestos in soil (low conc.) 109-08-TRE-SOIL-011.60.6~3.3 3g powder Tremotile-asbestos in soil (high conc.) 109-08-TRE-SOIL-023.61.9~5.9

2. Polymers Paint CRMs - KTR (Korea Testing & Research Institute) Product info.CRM No.Component Certified Value (mg/kg) Description Capacity and Form Picture ABS (For Pthalate plasticizer analysis) 113-02-PT-001 Dimethyl phthalate782 ± 31 This Certified Reference Material is ABS (Acrylonitrile-Butadiene-Styrene) resin in the form of pellets. It can be used for the validation of analytical methods and calibration of analysis equipment during measurement of phthalates plasticizers to correspond with environmental regulations, such as RoHS and REACH. 20g pellet (1mm Ø × 3mm) Diethyl phthalate861 ± 32 Di-n-butyl phthalate868 ± 40 Butylbenzyl phthalate865 ± 44 Di-2-ethylhexyl phthalate919 ± 36 Di-n-octyl phthalate928 ± 36 PS (For Pthalate plasticizer analysis) 113-02-PT-002 Dimethyl phthalate1054 ± 25 This Certified Reference Material is PS (poltestyrene) resin in the form of pellets. It can be used for the validation of analytical methods and calibration of analysis equipment during measurement of phthalates plasticizers to correspond with environmental regulations, such as RoHS and REACH. 20g pellet (1mm Ø × 3mm) Diethyl phthalate1096 ± 33 Di-n-butyl phthalate1145 ± 51 Butylbenzyl phthalate1045 ± 31 Di-2-ethylhexyl phthalate1065 ± 27 Di-n-octyl phthalate1113 ± 28 Product infoCRM No.Component Certified Value(mg/kg) Description Capacity and Form Picture Paint containing heavy metals (Nominal 200mg/kg Lead) 110-05-Paint-01 Pb192 ± 5 Powder coating of Epoxy/Polyesther line. It can be used for the validation of analytical methods and calibration of analysis equipment during measurement of heavy metals(Pb, Cd) to correspond with environmental regulations, such as RoHS and REACH. 25 g powder (50 μm ~ 100 μm) Cd45.0 ± 4.4 Paint containing heavy metals (Nominal 1000mg/kg Lead) 110-05-Paint-02 Pb944 ± 14 Cd226 ± 6

3. Nonferrous metals -The exact uncertainties is listed in the certificate. -Must confirm the latest information through KTR website (http://www.ktr.or.kr) for validity period. -This Certified Reference Material should be stored in clean and dark place of (20 ± 10) ℃. -This Certified Reference Material is produced by “Development and commercialization program for expansion of International Commercial Reference Material production” (Ministry of Trade, Industry and Energy). CRMs - KTR (Korea Testing & Research Institute) Product Info.CRM No.Comp.Certified Value(%)Description Capacity and Form Picture Phosphor Bronze Certified Reference Materials 102-02-PBSN20 Cu97.37 ± 0.58 This Certified Reference Material is in the form of chips. It can be used for calibrating results and plotting calibration curves to measure Cu, Sn, P, Pb, Ni, Co, Fe content in Phosphor Bronze sample. 25g chip Sn2.032 ± 0.113 P0.060 ± 0.004 Pb0.092 ± 0.006 Ni0.091 ± 0.005 Co0.195 ± 0.011 Fe0.064 ± 0.005 Silicon Brass Certified Reference Materials 102-02-SBSI5 Cu86.20 ± 0.62 This Certified Reference Material is in the form of chips. It can be used for calibrating results and plotting calibration curves to measure Cu, Zn, Si, Ni, Fe, Al content in Silicon brass sample. 20g chip Zn7.104 ± 0.363 Si5.377 ± 0.161 Ni0.257 ± 0.012 Fe0.461 ± 0.023 Al0.350 ± 0.018

4. Silica mixed polyacetal CRM Alumina(Al2O3) over 99 % CRM CRMs - KTL (Korea Testing Laboratory) Product Info.CRM No.Component Certified Value (mg/kg) Volume & typePicture Silica mixed polyacetal (high level) KTL-CRM-001 Pb687 ± 72 50g, chip Cd145 ± 14 Cr201 ± 11 Silica mixed polyacetal (low level) KTL-CRM-001-1 Pb80 ± 13 50g, chip Cd15.1 ± 1.8 Cr 20.6 ± 0.7 Product Info.CRM No.Component Certified Value (mg/kg) Volume & typePicture Alumina(Al2O3) over 99 % (high level) KTL-CRM-002 Pb926 ± 46 50 g, powder (below 100 ㎛ ) Cd94 ± 4 Cr846 ± 42 Alumina(Al2O3) over 99 % (low level) KTL-CRM-002-1 Pb158.8 ± 7.5 50 g, powder (below 100 ㎛ ) Cd11.2 ± 0.3 Cr86.4 ± 4.3