Supplier Page from Aladdin Scientific Corporation for 1,2,4,5-Tetrachlorobenzene standard in methanol
(La, Ce, Pr, Nd, Sm, Eu, Gd, Y) Multi-element mixed standard solution (mixed standard) from Aladdin Scientific Corporation
Biochemical oxygen demand standard from Aladdin Scientific Corporation
Lead standard from Aladdin Scientific Corporation
Mercury in Water from Aladdin Scientific Corporation