Proficiency Testing - Ammonia in Impinger Solution Item no. ERA-1045 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) 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)AE 083 (January 1, 2028 - March 16, 2028)AE 084 (May 1, 2028 - June 15, 2028)AE 085 (July 31, 2028 - September 14, 2028)AE 086 (October 27, 2028 - December 11, 2028)AE 087 (January 29, 2029 - March 15, 2029)AE 088 (April 30, 2029 - June 14, 2029)AE 089 (July 30, 2029 - September 13, 2029)AE 090 (October 26, 2029 - December 10, 2029) Add to cart Select to compare
Proficiency Testing - Uranium, PT Item no. ERA-4400 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)WP 384 (January 19, 2027 - March 5, 2027)WP 387 (April 19, 2027 - June 3, 2027)WP 390 (July 19, 2027 - September 2, 2027)WP 393 (October 15, 2027 - November 29, 2027)WP 396 (January 18, 2028 - March 3, 2028)WP 399 (April 17, 2028 - June 1, 2028)WP 402 (July 17, 2028 - August 31, 2028)WP 405 (October 13, 2028 - November 27, 2028)WP 408 (January 16, 2029 - March 2, 2029)WP 411 (April 16, 2029 - May 31, 2029)WP 414 (July 16, 2029 - August 30, 2029)WP 417 (October 12, 2029 - November 26, 2029) 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 363 (October 9, 2026 - November 23, 2026)WS 364 (November 2, 2026 - December 17, 2026)WS 365 (December 7, 2026 - January 21, 2027)WS 366 (January 11, 2027 - February 25, 2027)WS 367 (February 8, 2027 - March 25, 2027)WS 368 (March 8, 2027 - April 22, 2027)WS 369 (April 12, 2027 - May 27, 2027)WS 370 (May 10, 2027 -June 24, 2027)WS 371 (June 7, 2027 - July 22, 2027)WS 372 (July 12, 2027 - August 26, 2027)WS 373 (August 9, 2027 - September 23, 2027)WS 374 (September 7, 2027 - October 22, 2027)WS 375 (October 8, 2027 - November 22, 2027)WS 376 (November 1, 2027 - December 16, 2027)WS 377 (December 6, 2027 - January 20, 2028)WS 378 (January 10, 2028 - February 24, 2028)WS 379 (February 7, 2028 - March 23, 2028)WS 380 (March 6, 2028 - April 21, 2028)WS 381 (April 10, 2028 - May 25, 2028)WS 382 (May 8, 2028 -June 22, 2028)WS 383 (June 5, 2028 - July 20, 2028)WS 384 (July 10, 2028 - August 24, 2028)WS 385 (August 7, 2028 - September 21, 2028)WS 386 (September 5, 2028 - October 20, 2028)WS 387 (October 6, 2028 - November 20, 2028)WS 388 (November 6, 2028 - December 21, 2028)WS 389 (December 4, 2028 - January 18, 2029)WS 390 (January 8, 2029 - February 22, 2029)WS 391 (February 5, 2029 - March 22, 2029)WS 392 (March 5, 2029 - April 20, 2029)WS 393 (April 9, 2029 - May 24, 2029)WS 394 (May 7, 2029 -June 21, 2029)WS 395 (June 4, 2029 - July 20, 2029)WS 396 (July 9, 2029 - August 23, 2029)WS 397 (August 6, 2029 - September 20, 2029)WS 398 (September 4, 2029 - October 19, 2029)WS 399 (October 5, 2029 - November 19, 2029)WS 400 (November 5, 2029 - December 20, 2029)WS 401 (December 3, 2029 - January 17, 2030) Add to cart Select to compare
Proficiency Testing - Organic Carbon, potable water Item no. ERA-557 CAS Number 2 Analytes Unit each Analyte(s) Dissolved Organic Carbon (DOC) + 1 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 364 (November 2, 2026 - December 17, 2026)WS 365 (December 7, 2026 - January 21, 2027)WS 366 (January 11, 2027 - February 25, 2027)WS 367 (February 8, 2027 - March 25, 2027)WS 368 (March 8, 2027 - April 22, 2027)WS 369 (April 12, 2027 - May 27, 2027)WS 370 (May 10, 2027 -June 24, 2027)WS 371 (June 7, 2027 - July 22, 2027)WS 372 (July 12, 2027 - August 26, 2027)WS 373 (August 9, 2027 - September 23, 2027)WS 374 (September 7, 2027 - October 22, 2027)WS 375 (October 8, 2027 - November 22, 2027)WS 376 (November 1, 2027 - December 16, 2027)WS 377 (December 6, 2027 - January 20, 2028)WS 378 (January 10, 2028 - February 24, 2028)WS 379 (February 7, 2028 - March 23, 2028)WS 380 (March 6, 2028 - April 21, 2028)WS 381 (April 10, 2028 - May 25, 2028)WS 382 (May 8, 2028 -June 22, 2028)WS 383 (June 5, 2028 - July 20, 2028)WS 384 (July 10, 2028 - August 24, 2028)WS 385 (August 7, 2028 - September 21, 2028)WS 386 (September 5, 2028 - October 20, 2028)WS 387 (October 6, 2028 - November 20, 2028)WS 388 (November 6, 2028 - December 21, 2028)WS 389 (December 4, 2028 - January 18, 2029)WS 390 (January 8, 2029 - February 22, 2029)WS 391 (February 5, 2029 - March 22, 2029)WS 392 (March 5, 2029 - April 20, 2029)WS 393 (April 9, 2029 - May 24, 2029)WS 394 (May 7, 2029 -June 21, 2029)WS 395 (June 4, 2029 - July 20, 2029)WS 396 (July 9, 2029 - August 23, 2029)WS 397 (August 6, 2029 - September 20, 2029)WS 398 (September 4, 2029 - October 19, 2029)WS 399 (October 5, 2029 - November 19, 2029)WS 400 (November 5, 2029 - December 20, 2029)WS 401 (December 3, 2029 - January 17, 2030) Add to cart Select to compare
Proficiency Testing - Chlorinated Acid Herbicides in Soil, priority pollutant Item no. ERA-626 CAS Number 18 Analytes Unit each Analyte(s) 2,4,5-T + 17 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)SOIL 141 (January 24, 2028 - March 9, 2028)SOIL 142 (April 24, 2028 - June 8, 2028)SOIL 143 (July 24, 2028 - September 7, 2028)SOIL 144 (October 20, 2028 - December 4, 2028)SOIL 145 (January 22, 2029 - March 8, 2029)SOIL 146 (April 23, 2029 - June 7, 2029)SOIL 147 (July 23, 2029 - September 6, 2029)SOIL 148 (October 19, 2029 - December 3, 2029) Add to cart Select to compare
QuiKResponse - Nitrite, waste water (WasteWatR TM) Item no. ERA-770QR 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 - Silica, waste water (WasteWatR TM) Item no. ERA-775QR 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 - Surfactants-MBAS, waste water (WasteWatR TM) Item no. ERA-776QR 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 - pH, potable water (PotableWatR TM) Item no. ERA-779QR 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 - Surfactants-MBAS, potable water (PotableWatR TM) Item no. ERA-784QR 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 - Silica, potable water (PotableWatR TM) Item no. ERA-785QR 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 - Texas Low-Level Fuels (TPH) in Water Item no. ERA-794QR 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 - Texas Low-Level Fuels (TPH) in Soil Item no. ERA-796QR 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 - Texas High-Level Fuels (TPH) in Soil Item no. ERA-797QR 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 - Arizona TPH in Soil Item no. ERA-798QR CAS Number 3 Analytes Unit each Analyte(s) Diesel Range Organics + 2 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
Proficiency Testing - PCBs in Oil Item no. ERA-817 CAS Number 7 Analytes Unit each Analyte(s) Aroclor 1016 + 6 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)SOIL 141 (January 24, 2028 - March 9, 2028)SOIL 142 (April 24, 2028 - June 8, 2028)SOIL 143 (July 24, 2028 - September 7, 2028)SOIL 144 (October 20, 2028 - December 4, 2028)SOIL 145 (January 22, 2029 - March 8, 2029)SOIL 146 (April 23, 2029 - June 7, 2029)SOIL 147 (July 23, 2029 - September 6, 2029)SOIL 148 (October 19, 2029 - December 3, 2029) Add to cart Select to compare
Proficiency Testing - Pesticides, (PotableWatR TM), potable water Item no. ERA-850 CAS Number 22 Analytes Unit each Analyte(s) Alachlor + 21 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 364 (November 2, 2026 - December 17, 2026)WS 365 (December 7, 2026 - January 21, 2027)WS 366 (January 11, 2027 - February 25, 2027)WS 367 (February 8, 2027 - March 25, 2027)WS 368 (March 8, 2027 - April 22, 2027)WS 369 (April 12, 2027 - May 27, 2027)WS 370 (May 10, 2027 -June 24, 2027)WS 371 (June 7, 2027 - July 22, 2027)WS 372 (July 12, 2027 - August 26, 2027)WS 373 (August 9, 2027 - September 23, 2027)WS 374 (September 7, 2027 - October 22, 2027)WS 375 (October 8, 2027 - November 22, 2027)WS 376 (November 1, 2027 - December 16, 2027)WS 377 (December 6, 2027 - January 20, 2028)WS 378 (January 10, 2028 - February 24, 2028)WS 379 (February 7, 2028 - March 23, 2028)WS 380 (March 6, 2028 - April 21, 2028)WS 381 (April 10, 2028 - May 25, 2028)WS 382 (May 8, 2028 -June 22, 2028)WS 383 (June 5, 2028 - July 20, 2028)WS 384 (July 10, 2028 - August 24, 2028)WS 385 (August 7, 2028 - September 21, 2028)WS 386 (September 5, 2028 - October 20, 2028)WS 387 (October 6, 2028 - November 20, 2028)WS 388 (November 6, 2028 - December 21, 2028)WS 389 (December 4, 2028 - January 18, 2029)WS 390 (January 8, 2029 - February 22, 2029)WS 391 (February 5, 2029 - March 22, 2029)WS 392 (March 5, 2029 - April 20, 2029)WS 393 (April 9, 2029 - May 24, 2029)WS 394 (May 7, 2029 -June 21, 2029)WS 395 (June 4, 2029 - July 20, 2029)WS 396 (July 9, 2029 - August 23, 2029)WS 397 (August 6, 2029 - September 20, 2029)WS 398 (September 4, 2029 - October 19, 2029)WS 399 (October 5, 2029 - November 19, 2029)WS 400 (November 5, 2029 - December 20, 2029)WS 401 (December 3, 2029 - January 17, 2030) Add to cart Select to compare
Proficiency Testing - Color, Water Supply Item no. ERA-859C 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 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)WS 378 (January 10, 2028 - February 24, 2028)WS 381 (April 10, 2028 - May 25, 2028)WS 384 (July 10, 2028 - August 24, 2028)WS 387 (October 6, 2028 - November 20, 2028)WS 390 (January 8, 2029 - February 22, 2029)WS 393 (April 9, 2029 - May 24, 2029)WS 396 (July 9, 2029 - August 23, 2029)WS 399 (October 5, 2029 - November 19, 2029) Add to cart Select to compare
Proficiency Testing - Color, Water Pollution Item no. ERA-882C 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)WP 384 (January 19, 2027 - March 5, 2027)WP 387 (April 19, 2027 - June 3, 2027)WP 390 (July 19, 2027 - September 2, 2027)WP 393 (October 15, 2027 - November 29, 2027)WP 396 (January 18, 2028 - March 3, 2028)WP 399 (April 17, 2028 - June 1, 2028)WP 402 (July 17, 2028 - August 31, 2028)WP 405 (October 13, 2028 - November 27, 2028)WP 408 (January 16, 2029 - March 2, 2029)WP 411 (April 16, 2029 - May 31, 2029)WP 414 (July 16, 2029 - August 30, 2029)WP 417 (October 12, 2029 - November 26, 2029) Add to cart Select to compare
QuiKResponse - Carbamate Pesticides, priority pollutant (PriorityPollutnT TM) Item no. ERA-908QR CAS Number 12 Analytes Unit each Analyte(s) 3-Hydroxycarbofuran + 11 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
QuiKResponse - Gasoline Additives, potable water (PotableWatR TM) Item no. ERA-909QR CAS Number 6 Analytes Unit each Analyte(s) Diisopropylether + 5 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
QuiKResponse - Perchlorate, potable water (PotableWatR TM) Item no. ERA-910QR 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 - Settleable Solids, waste water (WasteWatR TM) Item no. ERA-911QR 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 - Volatile Solids, waste water (WasteWatR TM) Item no. ERA-913QR 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 - Corrosivity/pH in Soil, priority pollutant (PriorityPollutnT TM) Item no. ERA-914QR 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 - Acidity, waste water (WasteWatR TM) Item no. ERA-915QR 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 - Low-Level Total Residual Chlorine Item no. ERA-917QR 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 - Boron, waste water (WasteWatR TM) Item no. ERA-919QR 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 - Nitroaromatics & Nitramines Soil, priority pollutant (PrPollutnT TM) Item no. ERA-920QR CAS Number 14 Analytes Unit each Analyte(s) 1,3,5-Trinitrobenzene + 13 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
QuiKResponse - Hexavalent Chromium in Soil, priority pollutant (PriorityPollutnT TM) Item no. ERA-921QR 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 - Organophosphorus Pesticide (OPP) Soil, priority pollutant (PrPollutnT TM) Item no. ERA-925QR CAS Number 13 Analytes Unit each Analyte(s) Azinphos-methyl (Guthion) + 12 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
QuiKResponse - Carbamate Pesticides in Soil, priority pollutant (PriorityPollutnT TM) Item no. ERA-926QR CAS Number 12 Analytes Unit each Analyte(s) 3-Hydroxycarbofuran + 11 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
QuiKResponse - Glycols in Soil Item no. ERA-928QR CAS Number 5 Analytes Unit each Analyte(s) Diethylene glycol + 4 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare
QuiKResponse - Uranium, potable water (PotableWatR TM) Item no. ERA-930QR 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 - Low-Level Mercury, waste water (WasteWatR TM) Item no. ERA-931QR 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 - Organphosphorus Pesticides (OPP) Item no. ERA-954 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 - 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)WS 378 (January 10, 2028 - February 24, 2028)WS 381 (April 10, 2028 - May 25, 2028)WS 384 (July 10, 2028 - August 24, 2028)WS 387 (October 6, 2028 - November 20, 2028)WS 390 (January 8, 2029 - February 22, 2029)WS 393 (April 9, 2029 - May 24, 2029)WS 396 (July 9, 2029 - August 23, 2029)WS 399 (October 5, 2029 - November 19, 2029) Add to cart Select to compare
QuiKResponse - pH, waste water (WasteWatR TM) Item no. ERA-977QR 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 - Ignitability/Flash Point, priority pollutant (PriorityPollutnT TM) Item no. ERA-979QR 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 - Corrosivity, potable water (PotableWatR TM) Item no. ERA-980QR 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 - Cyanide, potable water (PotableWatR TM) Item no. ERA-983QR 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 - Hexavalent Chromium, waste water (WasteWatR TM) Item no. ERA-984QR 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
PFAS Secondary Source Std., Drinking water Item no. ERA-PFAS10002 CAS Number 29 Analytes Unit each Analyte(s) 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) + 28 more + Structural Formula + View all product details Price on request - + Add to cart Select to compare