Proficiency Testing - Ammonia as N Item no. ERA-1319 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 360 (July 13, 2026 - August 27, 2028) Add to cart All product details
Certified Reference Material - Quality Control Product -Ammonia as N Item no. ERA-1359 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - Ammonia as N Item no. ERA-1359QR Unit each Analytes Select to compare Price on request - + Add to cart All product details
Proficiency Testing - 1,4-Dioxane Item no. ERA-272 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) WS 360 (July 13, 2026 - August 27, 2026)WS 366 (January 11, 2027 - February 25, 2027)WS 372 (July 12, 2027 - August 26, 2027) Add to cart All product details
Proficiency Testing - 1,4-Dioxane Item no. ERA-461 Unit each Analytes Select to compare Price on request - + Participation round: Round ID (Opens - Closes) SOIL 135 (July 27, 2026 - September 10, 2026)SOIL 137 (January 25, 2027 - March 11, 2027)SOIL 139 (July 26, 2027 - September 9, 2027) Add to cart All product details
Certified Reference Material - 1,4-Dioxane Item no. ERA-538 Unit each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - 1,4-Dioxane Item no. ERA-538QR 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 each Analytes Select to compare Price on request - + Add to cart All product details
QuiKResponse - 1,4-Dioxane Item no. ERA-689QR Unit each Analytes Select to compare Price on request - + Add to cart All product details