ppm = μg/mL = mg/L
ppm = μg/ml = mg/L 1000 ppm = 1000 mg/L = 1000000 μg/L 14.007 g N/mol = 14.007 μg N/μM 14.007 μg N/μM = 1 μg N/x μM 1 μg N = 0.071392875 μM N If N stock solution = 1000 mg/L = 1000000 μg/L 1000000 μg N/L * 0.071392875 μM N/μg N = 71392.875 ......