Proficiency Testing - Semivolatiles on Polyurethane foam (Pair) Item no. ERA-1010 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) AE 074 (October 24, 2025 - December 8, 2025)AE 075 (January 30, 2026 - March 16, 2026)AE 076 (May 1, 2026 - June 15, 2026)AE 077 (July 31, 2026 - September 14, 2026)AE 078 (October 30, 2026 - December 14, 2026)AE 079 (January 29, 2027 - March 15, 2027)AE 080 (April 30, 2027 - June 14, 2027)AE 081 (July 30, 2027 - September 13, 2027)AE 082 (October 29, 2027 - December 13, 2027) Add to cart All product details
Proficiency Testing - Organochlorine Pesticides on Polyurethane foam Item no. ERA-1011 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) AE 074 (October 24, 2025 - December 8, 2025)AE 075 (January 30, 2026 - March 16, 2026)AE 076 (May 1, 2026 - June 15, 2026)AE 077 (July 31, 2026 - September 14, 2026)AE 078 (October 30, 2026 - December 14, 2026)AE 079 (January 29, 2027 - March 15, 2027)AE 080 (April 30, 2027 - June 14, 2027)AE 081 (July 30, 2027 - September 13, 2027)AE 082 (October 29, 2027 - December 13, 2027) Add to cart All product details
Proficiency Testing - Aldehydes & Ketones on Sorbent Item no. ERA-1014 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) AE 074 (October 24, 2025 - December 8, 2025)AE 075 (January 30, 2026 - March 16, 2026)AE 076 (May 1, 2026 - June 15, 2026)AE 077 (July 31, 2026 - September 14, 2026)AE 078 (October 30, 2026 - December 14, 2026)AE 079 (January 29, 2027 - March 15, 2027)AE 080 (April 30, 2027 - June 14, 2027)AE 081 (July 30, 2027 - September 13, 2027)AE 082 (October 29, 2027 - December 13, 2027) Add to cart All product details
Proficiency Testing - Metals on Filter Paper Item no. ERA-1025 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) AE 074 (October 24, 2025 - December 8, 2025)AE 075 (January 30, 2026 - March 16, 2026)AE 076 (May 1, 2026 - June 15, 2026)AE 077 (July 31, 2026 - September 14, 2026)AE 078 (October 30, 2026 - December 14, 2026)AE 079 (January 29, 2027 - March 15, 2027)AE 080 (April 30, 2027 - June 14, 2027)AE 081 (July 30, 2027 - September 13, 2027)AE 082 (October 29, 2027 - December 13, 2027) Add to cart All product details
Proficiency Testing - Mercury on Filter Paper Item no. ERA-1027 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) AE 074 (October 24, 2025 - December 8, 2025)AE 075 (January 30, 2026 - March 16, 2026)AE 076 (May 1, 2026 - June 15, 2026)AE 077 (July 31, 2026 - September 14, 2026)AE 078 (October 30, 2026 - December 14, 2026)AE 079 (January 29, 2027 - March 15, 2027)AE 080 (April 30, 2027 - June 14, 2027)AE 081 (July 30, 2027 - September 13, 2027)AE 082 (October 29, 2027 - December 13, 2027) Add to cart All product details
Proficiency Testing - Mercury in Impinger Solution Item no. ERA-1028 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) AE 074 (October 24, 2025 - December 8, 2025)AE 075 (January 30, 2026 - March 16, 2026)AE 076 (May 1, 2026 - June 15, 2026)AE 077 (July 31, 2026 - September 14, 2026)AE 078 (October 30, 2026 - December 14, 2026)AE 079 (January 29, 2027 - March 15, 2027)AE 080 (April 30, 2027 - June 14, 2027)AE 081 (July 30, 2027 - September 13, 2027)AE 082 (October 29, 2027 - December 13, 2027) Add to cart All product details
Proficiency Testing - Particulate Matter on Filter Paper Item no. ERA-1050 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) AE 074 (October 24, 2025 - December 8, 2025)AE 075 (January 30, 2026 - March 16, 2026)AE 076 (May 1, 2026 - June 15, 2026)AE 077 (July 31, 2026 - September 14, 2026)AE 078 (October 30, 2026 - December 14, 2026)AE 079 (January 29, 2027 - March 15, 2027)AE 080 (April 30, 2027 - June 14, 2027)AE 081 (July 30, 2027 - September 13, 2027)AE 082 (October 29, 2027 - December 13, 2027) Add to cart All product details
Proficiency Testing - Particulate Matter in Impinger Solution Item no. ERA-1051 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) AE 074 (October 24, 2025 - December 8, 2025)AE 075 (January 30, 2026 - March 16, 2026)AE 076 (May 1, 2026 - June 15, 2026)AE 077 (July 31, 2026 - September 14, 2026)AE 078 (October 30, 2026 - December 14, 2026)AE 079 (January 29, 2027 - March 15, 2027)AE 080 (April 30, 2027 - June 14, 2027)AE 081 (July 30, 2027 - September 13, 2027)AE 082 (October 29, 2027 - December 13, 2027) Add to cart All product details
Certified Reference Material - Aldehydes & Ketones on Sorbent Item no. ERA-1114 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Sulfuric Acid in Impinger Solution, AE Item no. ERA-1144 Unit 15 mL Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Free Cyanide, clean water (synthetic drinking water matrix) Item no. ERA-1345 Unit 15 mL vial Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Demand, clean water (synthetic drinking water matrix) Item no. ERA-1354 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Proficiency Testing - Perchlorate Item no. ERA-1500 Unit 15 mL Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WP 369 (October 10, 2025 - November 24, 2025)WP 372 (January 20, 2026 - March 6, 2026)WP 375 (April 20, 2026 - June 4, 2026)WP 378 (July 20, 2026 - September 3, 2026)WP 381 (October 16, 2026 - November 30, 2026) Add to cart All product details
Certified Reference Material - Metals in sewage sludge (Sewage SludG TM), priority pollutant (PriorityPollutnT TM) Item no. ERA-160 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Proficiency Testing - Oxygen, dissolved in water Item no. ERA-212 Unit 500 mL Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WP 369 (October 10, 2025 - November 24, 2025)WP 372 (January 20, 2026 - March 6, 2026)WP 375 (April 20, 2026 - June 4, 2026)WP 378 (July 20, 2026 - September 3, 2026)WP 381 (October 16, 2026 - November 30, 2026) Add to cart All product details
Certified Reference Material - Hexavalent Chromium QC plus QC Standard Item no. ERA-4183 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Total Residual Chlorine, waste water (WasteWatR TM) Item no. ERA-501 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Cyanide, waste water (WasteWatR TM) Item no. ERA-502 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Solids, Concentrate, potable water (PotableWatR TM) Item no. ERA-5152 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - 1 liter Oil & Grease, waste water (WasteWatR TM) Item no. ERA-518QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Massachusetts VPH in Soil Item no. ERA-568 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Proficiency Testing - Simple Nutrients, waste water Item no. ERA-584 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WP 368 (September 15, 2025 - October 30, 2025)WP 369 (October 10, 2025 - November 24, 2025)WP 370 (November 3, 2025 - December 18, 2025)WP 371 (December 8, 2025 - January 22, 2026)WP 372 (January 20, 2026 - March 6, 2026)WP 373 (February 16, 2026 - April 2, 2026)WP 374 (March 16, 2026 - April 30, 2026)WP 375 (April 20, 2026 - June 4, 2026)WP 376 (May 18, 2026 - July 2, 2026)WP 377 (June 15, 2026 - July 30, 2026)WP 378 (July 20, 2026 - September 3, 2026)WP 379 (August 17, 2026 - October 1, 2026)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 All product details
QuiKResponse - PFAS in Soil Item no. ERA-603QR Unit 10 g Analytes Select to compare Price on request - + Add to cart All product details
Proficiency Testing - Metals in Soil, priority pollutant Item no. ERA-620 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) SOIL 132 (October 17, 2025 - December 1, 2025)SOIL 133 (January 26, 2026 - March 12, 2026)SOIL 134 (April 27, 2026 - June 11, 2026)SOIL 135 (July 27, 2026 - September 10, 2026)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 All product details
Certified Reference Material - Hexavalent Chromium, potable water (PotableWatR TM) Item no. ERA-658 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Nitrogen Pesticides, priority pollutant (PriorityPollutnT TM) Item no. ERA-674QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Low-Level Nitroaromatics & Nitramines, priority pollutant (PrPollutnT TM) Item no. ERA-677 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Organophosphorus Pesticides (OPP), WS Item no. ERA-681 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - 1,4-Dioxane Item no. ERA-689 Unit 2 mL (ampoule) Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - 1,4-Dioxane Item no. ERA-689QR Unit 2 mL (ampoule) Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - EDB/DBCP/TCP Item no. ERA-692QR Unit 2 mL (ampoule) Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Halomethanes (THMs), potable water (PotableWatR TM) Item no. ERA-702 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Pesticides, potable water (PotableWatR TM) Item no. ERA-709 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Acids, priority pollutant (PriorityPollutnT TM) Item no. ERA-712QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Low-Level PAHs, priority pollutant (PriorityPollutnT TM) Item no. ERA-715QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Low-Level PAHs in Soil, priority pollutant (PriorityPollutnT TM) Item no. ERA-722 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Base/Neutrals & Acids in Soil, priority pollutant (PriorityPollutnT TM) Item no. ERA-727 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - PFAS Drinking Water (ISO 17034) Item no. ERA-733 Unit 2mL Flame Sealed Ampule Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - PFAS Drinking Water (ISO 17034) Item no. ERA-733QR Unit 2mL Flame Sealed Ampule Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Texas Low-Level Fuels (TPH) in Water Item no. ERA-794 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Texas High-Level Fuels (TPH) in Water Item no. ERA-795 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Proficiency Testing - Hexavalent Chromium in Soil, priority pollutant Item no. ERA-876 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) SOIL 132 (October 17, 2025 - December 1, 2025)SOIL 133 (January 26, 2026 - March 12, 2026)SOIL 134 (April 27, 2026 - June 11, 2026)SOIL 135 (July 27, 2026 - September 10, 2026)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 All product details
Proficiency Testing - Acidity, waste water Item no. ERA-885 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WP 369 (October 10, 2025 - November 24, 2025)WP 372 (January 20, 2026 - March 6, 2026)WP 375 (April 20, 2026 - June 4, 2026)WP 378 (July 20, 2026 - September 3, 2026)WP 381 (October 16, 2026 - November 30, 2026) Add to cart All product details
Proficiency Testing - Bromide, waste water Item no. ERA-887 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WP 369 (October 10, 2025 - November 24, 2025)WP 372 (January 20, 2026 - March 6, 2026)WP 375 (April 20, 2026 - June 4, 2026)WP 378 (July 20, 2026 - September 3, 2026)WP 381 (October 16, 2026 - November 30, 2026) Add to cart All product details
Proficiency Testing - Silica, potable water Item no. ERA-902 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 351 (October 3, 2025 - November 17, 2025)WS 354 (January 12, 2026 - February 26, 2026)WS 357 (April 13, 2026 - May 28, 2026)WS 360 (July 13, 2026 - August 27, 2026)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 All product details
QuiKResponse - Ready-to-Use VOAs in Soil, priority pollutant (PriorityPollutnT TM) Item no. ERA-924QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Organophosphorus Pesticide (OPP) Soil, priority pollutant (PrPollutnT TM) Item no. ERA-925QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Proficiency Testing - PFAS Drinking Water, Quarterly (ISO 17034) Item no. ERA-959 Unit 2mL Flame Sealed Ampule Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 351 (October 3, 2025 - November 17, 2025)WS 354 (January 12, 2026 - February 26, 2026)WS 357 (April 13, 2026 - May 28, 2026)WS 360 (July 13, 2026 - August 27, 2026)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 All product details
Certified Reference Material - pH, waste water (WasteWatR TM) Item no. ERA-977 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Hexavalent Chromium, waste water (WasteWatR TM) Item no. ERA-984 Unit each Analytes Select to compare Price on request - + Add to cart All product details