硅酸根标准溶液  Silicate standard solution  50mL  

氟、氯、硫酸根、硝酸根4种阴离子混合溶液标准物质  Fluoride, chlorine, sulfate, nitrate 4 kinds of anionic mixed solution standard material  50mL  

7种阴离子混标(氟、氯、溴、硝酸根、亚硝酸根、硫酸根、磷酸根)  7 anions mixed (fluorine, chlorine, bromine, nitrate, nitrite, sulfate, phosphate)  50mL  

氨氮标准溶液  Ammonia nitrogen standard solution  20mL  

总氮溶液标准物质  Total nitrogen solution reference material  50mL  

总氮溶液标准物质  Total nitrogen solution reference material  50mL  

总有机碳溶液标准物质  Total organic carbon solution reference material  50mL  

磷酸盐溶液标准物质  Phosphate solution reference material  100mL  

氯化物溶液标准物质  Chloride solution reference material  100mL  

硫酸盐溶液标准物质  Sulfate solution reference material  100mL