Pests & Facilities第 131 / 240 题

How should the concentration of a chlorine sanitizer solution be verified?

a.By smell alone
b.With chlorine test strips
c.By the color of the water
d.By tasting a drop

解析

Sanitizer concentration must be checked with the correct test strips (chlorine test strips for a chlorine solution) to confirm it is within 50-100 ppm. Smell, color, or taste cannot measure ppm and are unsafe methods. Solutions should be tested regularly because they weaken with use and time.

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