The following procedure is used to determine the concentration of residual ethylene glycol, diethylene glycol, and triethylene glycol in ethoxylated products. Ethoxylated products may contain residual ethylene glycol, diethylene glycol, and triethylene glycol as a result of the manufacturing process. The procedure is suitable for the following substances:

1. Polyethylene glycol 200

2. Polyethylene glycol 300

3. Polyethylene glycol 400

4. Polyethylene glycol 600

5. Polyethylene glycol 1000

6. Polysorbate 20

7. Polysorbate 40

8. Polysorbate 60

9. Polysorbate 80

10. Polyethylene glycol monomethyl ether 350

11. Polyethylene glycol monomethyl ether 550

12. Polyoxyl 35 castor oil

13. Polyoxyl 15 hydroxystearate

14. Polyoxyl 20 cetostearyl ether

15. Polyoxyl 8 stearate

16. Octoxynol 9

17. Nonoxynol 9