Abstract: A reagent dispenser includes a housing. A container of microbial inhibitor is disposed within the housing. A dispensing system is disposed within the housing and operable to dispense the microbial inhibitor from the container. The dispensing system is calibrated to dispense a calibrated weight per water sample of the microbial inhibitor, such that a ratio of the calibrated weight per water sample to inner volume of a sample bottle substantially equals a predetermined concentration of microbial inhibitor per liter of water determined to acidify water to a pH of 4 or less.

Abstract: A reagent dispenser includes a housing. A container of microbial inhibitor is disposed within the housing. A dispensing system is disposed within the housing and operable to dispense the microbial inhibitor from the container. The dispensing system is calibrated to dispense a calibrated weight per water sample of the microbial inhibitor, such that a ratio of the calibrated weight per water sample to inner volume of a sample bottle substantially equals a predetermined concentration of microbial inhibitor per liter of water determined to acidify water to a pH of 4 or less.

Abstract: A method of collecting a sample for determination of 1,4-dioxane in drinking water includes providing a reagent dispenser operable to dispense a microbial inhibitor. A sample bottle having a predetermined inner volume is provided to a preparation site. The dispenser is calibrated to dispense a calibrated weight of the microbial inhibitor, such that a ratio of the calibrated weight to inner volume substantially equals a predetermined concentration of microbial inhibitor per liter of water determined to acidify water to a pH of 4 or less. The sample bottle is transported to a field site. The field site is remote from the preparation site. A sample of water is collected in the sample bottle at the field site that substantially fills the inner volume of the sample bottle. The dispenser is operated to substantially dispense the calibrated weight of microbial inhibitor into the sample of water.

Abstract: A method of collecting a sample for determination of 1,4-dioxane in drinking water includes providing a reagent dispenser operable to dispense a microbial inhibitor. A sample bottle having a predetermined inner volume is provided to a preparation site. The dispenser is calibrated to dispense a calibrated weight of the microbial inhibitor, such that a ratio of the calibrated weight to inner volume substantially equals a predetermined concentration of microbial inhibitor per liter of water determined to acidify water to a pH of 4 or less. The sample bottle is transported to a field site. The field site is remote from the preparation site. A sample of water is collected in the sample bottle at the field site that substantially fills the inner volume of the sample bottle. The dispenser is operated to substantially dispense the calibrated weight of microbial inhibitor into the sample of water.