Ammonia as Nitrogen (N) - 1000 mg/L Item no. ERA-045 CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Certified Reference Material - Color, Water Pollution Item no. ERA-1070C CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Add to cart Select to compare
QuiKResponse - Color, Water Pollution Item no. ERA-1070CQR CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Add to cart Select to compare
QuiKResponse - Perchlorate Item no. ERA-1501QR CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Proficiency Testing, PCB Congeners in Wastewater, WP PT Item no. ERA-2685 CAS Number n/a Unit each Structural formula: n/a View all product details Price on request - + Add to cart Select to compare
Proficiency Testing, PCB Congeners in Soil, Soil PT Item no. ERA-2994 CAS Number n/a Unit each Structural formula: n/a View all product details Price on request - + Add to cart Select to compare
Certified Reference Material - 1,4-Dioxane Item no. ERA-402 CAS Number n/a Unit each Structural formula: n/a View all product details Price on request - + Add to cart Select to compare
Nutrients QC plus QC Standard Item no. ERA-4023 CAS Number 6 Analytes Unit each Analyte(s) Ammonia (as N) + 5 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
QuiKResponse - PFAS - in wastewater Item no. ERA-404QR CAS Number 44 Analytes Unit each Analyte(s) 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) + 43 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Proficiency Testing - PFAS in Soil Item no. ERA-465 CAS Number 40 Analytes Unit each Analyte(s) 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS), potassium salt + 39 more + Structural Formula + View all product details Price on request - + Participation round: Round ID (Opens - Closes) SOIL 136 (October 23, 2026 - December 7, 2026)SOIL 137 (January 25, 2027 - March 11, 2027)SOIL 138 (April 26, 2027 - June 10, 2027)SOIL 139 (July 26, 2027 - September 9, 2027)SOIL 140 (October 22, 2027 - December 6, 2027) Add to cart Select to compare
Proficiency Testing - Texas Low-Level Fuels (TPH) in Water Item no. ERA-476 CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Participation round: Round ID (Opens - Closes) WP 381 (October 16, 2026 - November 30, 2026) Add to cart Select to compare
Proficiency Testing - Texas High-Level Fuels (TPH) in Water Item no. ERA-477 CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Participation round: Round ID (Opens - Closes) WP 380 (September 14, 2026 - October 29, 2026)WP 381 (October 16, 2026 - November 30, 2026)WP 382 (November 6, 2026 - December 21, 2026)WP 383 (December 14, 2026 - January 28, 2027) Add to cart Select to compare
Proficiency Testing - Texas Low-Level Fuels (TPH) in Soil Item no. ERA-478 CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Participation round: Round ID (Opens - Closes) SOIL 136 (October 23, 2026 - December 7, 2026)SOIL 137 (January 25, 2027 - March 11, 2027)SOIL 138 (April 26, 2027 - June 10, 2027)SOIL 139 (July 26, 2027 - September 9, 2027)SOIL 140 (October 22, 2027 - December 6, 2027) Add to cart Select to compare
Proficiency Testing - Texas High-Level Fuels (TPH) in Soil Item no. ERA-479 CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Participation round: Round ID (Opens - Closes) SOIL 136 (October 23, 2026 - December 7, 2026)SOIL 137 (January 25, 2027 - March 11, 2027)SOIL 138 (April 26, 2027 - June 10, 2027)SOIL 139 (July 26, 2027 - September 9, 2027)SOIL 140 (October 22, 2027 - December 6, 2027) Add to cart Select to compare
Proficiency Testing - Massachusetts VPH in Water Item no. ERA-481 CAS Number 13 Analytes Unit each Analyte(s) Benzene in VPH + 12 more + Structural Formula + View all product details Price on request - + Participation round: Round ID (Opens - Closes) WP 380 (September 14, 2026 - October 29, 2026)WP 381 (October 16, 2026 - November 30, 2026)WP 382 (November 6, 2026 - December 21, 2026)WP 383 (December 14, 2026 - January 28, 2027) Add to cart Select to compare
Proficiency Testing - Massachusetts VPH in Soil Item no. ERA-483 CAS Number 13 Analytes Unit each Analyte(s) Benzene in VPH + 12 more + Structural Formula + View all product details Price on request - + Participation round: Round ID (Opens - Closes) SOIL 136 (October 23, 2026 - December 7, 2026)SOIL 137 (January 25, 2027 - March 11, 2027)SOIL 138 (April 26, 2027 - June 10, 2027)SOIL 139 (July 26, 2027 - September 9, 2027)SOIL 140 (October 22, 2027 - December 6, 2027) Add to cart Select to compare
Proficiency Testing - Lithium, PT Item no. ERA-4990 CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Participation round: Round ID (Opens - Closes) WP 385 (February 15, 2027 - April 1, 2027)WP 391 (August 16, 2027 - September 30, 2027) Add to cart Select to compare
Oil and Grease- Ready-To-Use CRM - Waste water Item no. ERA-504 CAS Number 2 Analytes Unit each Analyte(s) n-Hexane Extractable Material (O&G) (Gravimetric) + 1 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Proficiency Testing - Solids, Concentrate, WS, potable water Item no. ERA-5150 CAS Number 3 Analytes Unit each Analyte(s) Total suspended solids (TSS) + 2 more + Structural Formula + View all product details Price on request - + Participation round: Round ID (Opens - Closes) WS 362 (September 8, 2026 - October 23, 2026)WS 363 (October 9, 2026 - November 23, 2026)WS 364 (November 2, 2026 - December 17, 2026)WS 365 (December 7, 2026 - January 21, 2027) Add to cart Select to compare
Minerals PT (Extra Volume) Item no. ERA-526 CAS Number 9 Analytes Unit each Analyte(s) Alkalinity (as CaCO3) + 8 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Hardness PT (Extra Volume) Item no. ERA-527 CAS Number n/a Unit each Structural formula: n/a View all product details Price on request - + Add to cart Select to compare
Proficiency Testing - Inorganic Disinfection 1 Item no. ERA-5270 CAS Number 2 Analytes Unit each Analyte(s) Chlorate + 1 more + Structural Formula + View all product details Price on request - + Participation round: Round ID (Opens - Closes) WS 362 (September 8, 2026 - October 23, 2026)WS 363 (October 9, 2026 - November 23, 2026)WS 364 (November 2, 2026 - December 17, 2026)WS 365 (December 7, 2026 - January 21, 2027) Add to cart Select to compare
Flame AA/ICP Cations Item no. ERA-530 CAS Number 4 Analytes Unit each Analyte(s) Calcium (Ca) + 3 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Proficiency Testing - o-Phosphate Nutrients, potable water Item no. ERA-558 CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Participation round: Round ID (Opens - Closes) WS 362 (September 8, 2026 - October 23, 2026)WS 363 (October 9, 2026 - November 23, 2026)WS 364 (November 2, 2026 - December 17, 2026)WS 365 (December 7, 2026 - January 21, 2027) Add to cart Select to compare
Certified Reference Material - Massachusetts EPH in Water Item no. ERA-567 CAS Number 22 Analytes Unit each Analyte(s) 2-Methylnaphthalene in EPH + 21 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Certified Reference Material - Massachusetts VPH in Soil Item no. ERA-568 CAS Number 13 Analytes Unit each Analyte(s) Benzene in VPH + 12 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Certified Reference Material - Total Petroleum Hydrocarbons (TPH) in Soil #1 Item no. ERA-570 CAS Number 2 Analytes Unit each Analyte(s) non-Polar Extractable Material (TPH) (Gravimetric) + 1 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Proficiency Testing - Trace Metals, waste water Item no. ERA-586 CAS Number 21 Analytes Unit each Analyte(s) Aluminium (Al) + 20 more + Structural Formula + View all product details Price on request - + Participation round: Round ID (Opens - Closes) WP 380 (September 14, 2026 - October 29, 2026)WP 381 (October 16, 2026 - November 30, 2026)WP 382 (November 6, 2026 - December 21, 2026)WP 383 (December 14, 2026 - January 28, 2027) Add to cart Select to compare
Proficiency Testing - Residual Chlorine, potable water Item no. ERA-593 CAS Number 2 Analytes Unit each Analyte(s) Residual free chlorine + 1 more + Structural Formula + View all product details Price on request - + Participation round: Round ID (Opens - Closes) WS 362 (September 8, 2026 - October 23, 2026)WS 363 (October 9, 2026 - November 23, 2026)WS 364 (November 2, 2026 - December 17, 2026)WS 365 (December 7, 2026 - January 21, 2027) Add to cart Select to compare
Proficiency Testing - Nitrite, potable water Item no. ERA-594 CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Participation round: Round ID (Opens - Closes) WS 362 (September 8, 2026 - October 23, 2026)WS 363 (October 9, 2026 - November 23, 2026)WS 364 (November 2, 2026 - December 17, 2026)WS 365 (December 7, 2026 - January 21, 2027) Add to cart Select to compare
Certified Reference Material, PCB Congeners in Soil, Soil CRM Item no. ERA-5988 CAS Number n/a Unit each Structural formula: n/a View all product details Price on request - + Add to cart Select to compare
Certified Reference Material - Total Petroleum Hydrocarbons (TPH) in Water #1 Item no. ERA-600 CAS Number 2 Analytes Unit each Analyte(s) Total Petroleum Hydrocarbons (Gravimetric) + 1 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Proficiency Testing - Low-Level PAHs in Soil, priority pollutant Item no. ERA-625 CAS Number 16 Analytes Unit each Analyte(s) Acenaphthene + 15 more + Structural Formula + View all product details Price on request - + Participation round: Round ID (Opens - Closes) SOIL 136 (October 23, 2026 - December 7, 2026)SOIL 137 (January 25, 2027 - March 11, 2027)SOIL 138 (April 26, 2027 - June 10, 2027)SOIL 139 (July 26, 2027 - September 9, 2027)SOIL 140 (October 22, 2027 - December 6, 2027) Add to cart Select to compare
Proficiency Testing - Toxaphene in Soil, priority pollutant Item no. ERA-627 CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Participation round: Round ID (Opens - Closes) SOIL 136 (October 23, 2026 - December 7, 2026)SOIL 137 (January 25, 2027 - March 11, 2027)SOIL 138 (April 26, 2027 - June 10, 2027)SOIL 139 (July 26, 2027 - September 9, 2027)SOIL 140 (October 22, 2027 - December 6, 2027) Add to cart Select to compare
Certified Reference Material - Hexavalent Chromium, potable water (PotableWatR TM) Item no. ERA-658 CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Certified Reference Material - Vanadium, potable water (PotableWatR TM) Item no. ERA-660 CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Certified Reference Material - UV 254 Absorbance, potable water (PotableWatR TM) Item no. ERA-662 CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Certified Reference Material - Dioxin, potable water (PotableWatR TM) Item no. ERA-663 CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Certified Reference Material - Organophosphorus Pesticides (OPP), priority pollutant (PrPollutnT TM) Item no. ERA-665 CAS Number 22 Analytes Unit each Analyte(s) Azinphos-methyl (Guthion) + 21 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Certified Reference Material - Mercury, potable water (PotableWatR TM) Item no. ERA-666 CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Certified Reference Material - o-Phosphate Nutrients, potable water (PotableWatR TM) Item no. ERA-667 CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Certified Reference Material - Organic Carbon, potable water (PotableWatR TM) Item no. ERA-669 CAS Number 2 Analytes Unit each Analyte(s) Dissolved Organic Carbon (DOC) + 1 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Certified Reference Material - Total Organic Halides (TOX), waste water (WasteWatR TM) Item no. ERA-670 CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Add to cart Select to compare
QuiKResponse - Total Organic Halides (TOX), waste water (WasteWatR TM) Item no. ERA-670QR CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Certified Reference Material - Nitrogen Pesticides, priority pollutant (PriorityPollutnT TM) Item no. ERA-674 CAS Number 25 Analytes Unit each Analyte(s) Alachlor + 24 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Certified Reference Material - Unregulated Volatiles, potable water (PotableWatR TM) Item no. ERA-683 CAS Number 28 Analytes Unit each Analyte(s) 1,1,1,2-Tetrachloroethane + 27 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Certified Reference Material - Metals, potable water (PotableWatR TM) Item no. ERA-697 CAS Number 19 Analytes Unit each Analyte(s) Aluminium (Al) + 18 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Certified Reference Material - Turbidity, potable water (PotableWatR TM) Item no. ERA-699 CAS Number n/a Unit each Analyte(s) Analyte(s) + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Certified Reference Material - Organochlorine Pesticides, priority pollutant (PriorityPollutnT TM) Item no. ERA-713 CAS Number 20 Analytes Unit each Analyte(s) 4,4'-DDD + 19 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Proficiency Testing - PFAS Drinking Water, Quarterly (ISO 17034) Item no. ERA-959 CAS Number 32 Analytes Unit each Analyte(s) 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) + 31 more + Structural Formula + View all product details Price on request - + Participation round: Round ID (Opens - Closes) WS 363 (October 9, 2026 - November 23, 2026)WS 366 (January 11, 2027 - February 25, 2027)WS 369 (April 12, 2027 - May 27, 2027)WS 372 (July 12, 2027 - August 26, 2027)WS 375 (October 8, 2027 - November 22, 2027) Add to cart Select to compare