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This 20 oz

Storage: Protected from direct light and humidity at a temperature of 50-77F (10-25C)

0.9% benzyl alcohol

Lab Accreditation: NELAP-accredited and EPA-certified partner laboratory network (state-routed by SimpleLab)

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This kit uses EPA Method 200.8 ICP-MS (inductively coupled plasma mass spectrometry) for metals, which is two to three orders of magnitude more sensitive than any field strip or hand-held meter