40 ml glass vials Maleic acid Abscorbic acid 14 days Zero headspace <4 ° C Total Trihalomethanes 524.4 Yes 40 ml glass vials Maleic acid Abscorbic acid 14 days Zero headspace <4 ° C Haloacetic Acids (HAAs) 552.3 No Amber glass Ammonium chloride None 14-28 days Neck of container <4 ° C