Pool-testing kit

These acid- or alkaline-balanced products may be advertised as pH balanced. But what does pH mean We can get a clue from revisiting the pool test kit. The phenol red indicator is also labeled pH indicator pH is a measure of how acidic or basic a solution is. It is a measure of the acid quality of a solution. 

But why is a pH indicator found in a swimming pool test kit Why is it important to know how acidic or alkaline a swimming pool is Let s plunge into that topic. 

Add two drops of methyl red indicator (found in the swimming pool test kit) to the first cup. Immediately after the addition to the first cup, add four drops of methyl red indicator to the second cup. Swirl both cups gently to ensure mixing. Set both cups down on the white paper and note on the paper the time at which the drops were added. The red color present in each cup will fade slowly over the next five to ten minutes as the bleach attacks the dye molecules that are coloring the solutions. When the red color is gone from the cup with two drops, note the time on the paper and turn your attention to the cup with four drops. Note the completion time for that reaction on the sheet of paper. You can empty everything down the toilet bowl, but make sure to avoid splattering the bleach. 

The ideal pH for a swimming pool is 7.2, but a range between 7.0 and 7.6 will work, too. Most pool stores sell pH testing kits to monitor the pool s pH and chemicals to adjust it. 

Testing Water Quality Students use pool and spa test kits to test water for pH, chlorine, alkalinity, and hardness. Swimming pool and spa maintenance... 

Davey, R. J., Jett, B. W., and Alter, H. J. (1991). Pooling of blood donor sera prior to testing with rapid/simple HIV test kits. Transfusion, 31, 7. 

For health reasons, swimming pools are regularly treated with chemicals that are usually called "chlorine." However, the chemicals are more likely to be hypochlorites or similar compounds. The effectiveness of these disinfectants depends on how acidic or basic the water is. Pool owners must therefore measure and, if necessary, adjust, the acidity of their pool. A pH test kit, such as the one shown at left, can measure the balance of acids and bases dissolved in the pool water to ensure that it is in a healthy range. 

Fig. 3 Pb effect on expression of cytokines IL-6, TGF-P1, and IL-18 in the brain. Cytokine mRNA from the brains of female and male mouse pups at pnd21 was quantified by real-time RT-PCR. Whole-brain RNA was isolated using a Qiagen lipid Tissue kit. Mouse pup brains from each litter were pooled according to gender. AU cytokine RNA quantitation results were normalized to endogenous GAPDH. Each bar represents mean S.D. for an iV of 3 L. Significance, indicated by an asterisk,, was determined by the Student s /-test, p < 0.05. The p value for both female and male lL-6 gene expression Pb is 0.056 and the p value for male TGF-P1 gene expression Pb is 0.20 (Data for lL-6 and TGF-beta has been published in Kasten-JoUy et al., J. Biochem. Molec. Toxicol. 2010)...

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