Abstract: A sample of water is tested for silica and phosphate content in a single apparatus. In the test method, a first sample of the water is colorimetrically analyzed in a reaction chamber using a “molybdenum blue” test in which silica and phosphate in the sample are complexed with a first reagent. The phosphate complexes are then optically inactivated by a second reagent and the color of the silica complexes is intensified with a third reagent. From this, the silica content is calculated. A further sample is colorimetrically analyzed without using the second reagent, so that a combined silica and phosphate content of the further sample is obtained. A value of the silica content is subtracted from the value of the combined silica and phosphate content, resulting in a phosphate content for the sample. The silica content and the phosphate content of the sample are reportable.

Abstract: A sample of water is tested for silica and phosphate content in a single apparatus. In the test method, a first sample of the water is colorimetrically analyzed in a reaction chamber rusing a “molybdenum blue” test in which silica and phosphate in the sample are complexed with a first reagent. The phosphate complexes are then optically inactivated by a second reagent and the color of the silica complexes is intensified with a third reagent. From this, the silica content is calculated. A further sample is colorimetrically analyzed without using the second reagent, so that a combined silica and phosphate content of the further sample is obtained. A value of the silica content is subtracted from the value of the combined silica and phosphate content, resulting in a phosphate content for the sample. The silica content and the phosphate content of the sample are reportable.

Abstract: A battery includes a can having a rectangular or triangular cross section, the can having a closed end and an open end, a cathode in the can, an anode in the can, a separator between the cathode and the anode, and a seal assembly attached to the open end of the can.

Abstract: A battery cartridge includes a casing, a battery in the casing, and a slide moveably engaged with the casing. The battery has an opening, and the slide has an opening alignable with the opening of the battery.