Precision and Recovery Solution, 1.2ml, nonane

4-Nonylphenol diethoxylate, mixture of nonylisomers,100 µg/mL,MeOH,1mL,

N-Nitrosodiisopropylamine, 1000µg/mL in MeChl, 1ml

Mg, 1000 µg/mL in 2% HNO3, 100ml