urine test hand holding tube with indicator comparing color scale and litmus strips for measurement acidity |
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| navigate by keyword : acid acidity analysis background base beaker chart chemical chemistry color compare comparing design flat glass hand health healthcare holding illustration indicator isolated laboratory litmus measurement medical medicine paper pregnancy reagents research sample scale science strip strips test tube urinalysis urine water white with yellow |
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| Urine Test . Hand holding test tube with pH indicator comparing color to scale and litmus strips for measurement of acidity |
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