| NTA | Nitrilotriacetic acid |
| BAPTA | 1,2-Bis(2-aminophenoxy)ethane-N,N,N′,N′-tetraacetic acid |
| H2KTSM | 3-Ethoxy-2-oxobutyraldehyde-bis(N4-methylthiosemicarbazone) |
| NTA | Nitrilotriacetic acid |
| BAPTA | 1,2-Bis(2-aminophenoxy)ethane-N,N,N′,N′-tetraacetic acid |
| H2KTSM | 3-Ethoxy-2-oxobutyraldehyde-bis(N4-methylthiosemicarbazone) |