Foreign species

Tolerance level*/(mol L−1)

Cu2+, Ca2+, Mg2+, Cd2+, Fe3+, Zn2+,

Na+ and K+,

Uric acid,

Glucose, sucrose, starch, gelatin and lactose,

hypromellose, hydroxypropyl methylcellulose acetate succinate

and sodium lauryl sulfate

8.0 × 10−3

1.0 × 10−2

5.0 × 10−4

1.0 × 10−2

2.0 × 10−3