Proficiency Testing - BTEX & MTBE in Soil Item no. ERA-633 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) 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 - Gasoline Range Organics (GRO) in Water Item no. ERA-640 Unit 2 mL Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) 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 - Diesel Range Organics (DRO) in Water Item no. ERA-641 Unit 2 mL Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) 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 - Total Petroleum Hydrocarbons (TPH) in Water Item no. ERA-642 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) 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 - BTEX & MTBE in Water Item no. ERA-643 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) 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 - Wisconsin Diesel Range Organics (DRO) in Water Item no. ERA-648 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) 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 - Wisconsin Gasoline Range Org (GRO/PVOC) in Water Item no. ERA-649 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) 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
QuiKResponse - Hexavalent Chromium, potable water (PotableWatR TM) Item no. ERA-658QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Vanadium, potable water (PotableWatR TM) Item no. ERA-660QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Color, Water Supply Item no. ERA-661C Unit 30 mL Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Color, Water Supply Item no. ERA-661CQR Unit 30 mL Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - UV 254 Absorbance, potable water (PotableWatR TM) Item no. ERA-662QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Dioxin, potable water (PotableWatR TM) Item no. ERA-663QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Organophosphorus Pesticides (OPP), priority pollutant (PrPollutnT TM) Item no. ERA-665QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Mercury, potable water (PotableWatR TM) Item no. ERA-666 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Mercury, potable water (PotableWatR TM) Item no. ERA-666QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - o-Phosphate Nutrients, potable water (PotableWatR TM) Item no. ERA-667 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - o-Phosphate Nutrients, potable water (PotableWatR TM) Item no. ERA-667QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Organic Carbon, potable water (PotableWatR TM) Item no. ERA-669 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Organic Carbon, potable water (PotableWatR TM) Item no. ERA-669QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Total Organic Halides (TOX), waste water (WasteWatR TM) Item no. ERA-670 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Total Organic Halides (TOX), waste water (WasteWatR TM) Item no. ERA-670QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Nitrogen Pesticides, priority pollutant (PriorityPollutnT TM) Item no. ERA-674 Unit 2 mL 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 - Chloral Hydrate, potable water (PotableWatR TM) Item no. ERA-676 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Chloral Hydrate, potable water (PotableWatR TM) Item no. ERA-676QR 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
QuiKResponse - Low-Level Nitroaromatics & Nitramines, priority pollutant (PrPollutnT TM) Item no. ERA-677QR 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
OrganophosphorµS Pesticides (OPP), WS QR Item no. ERA-681QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Quality Control Product -Low-Level 1,2,3-TCP Item no. ERA-682 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Low-Level 1,2,3-TCP Item no. ERA-682QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Unregulated Volatiles, potable water (PotableWatR TM) Item no. ERA-683 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Unregulated Volatiles, potable water (PotableWatR TM) Item no. ERA-683QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Haloacetic Acids (HAA), potable water (PotableWatR TM) Item no. ERA-684 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Haloacetic Acids (HAA), potable water (PotableWatR TM) Item no. ERA-684QR 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
Certified Reference Material - Semivolatiles #1, potable water (PotableWatR TM) Item no. ERA-690 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Semivolatiles #1, potable water (PotableWatR TM) Item no. ERA-690QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Semivolatiles #2 Herbicides potable water (PotableWatR TM) Item no. ERA-691 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Semivolatiles #2 Herbicides potable water (PotableWatR TM) Item no. ERA-691QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Hardness, potable water (PotableWatR TM) Item no. ERA-693 Unit 250 mL Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Nitrite, potable water (PotableWatR TM) Item no. ERA-695 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Residual Chlorine, potable water (PotableWatR TM) Item no. ERA-696 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Metals, potable water (PotableWatR TM) Item no. ERA-697 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Inorganics, potable water (PotableWatR TM) Item no. ERA-698 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Turbidity, potable water (PotableWatR TM) Item no. ERA-699 Unit each Analytes Select to compare Price on request - + Add to cart All product details
Certified Reference Material - Toxaphene, potable water (PotableWatR TM) Item no. ERA-700 Unit each 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