28. The nitrite is involved in the biochemical nitrogen cycle. You can determine the nitrite ion conter of a sample using spectrophotometry by first using several organic compounds to form a colore compound from the ion. The following data were collected. a) Construct a calibration plot, and determine the slope and intercept. b) What is the nitrite ion concentration in the unknown solution? 28. The nitrite is involved in the biochemical nitrogen cycle. You can determine the nitrite ion content of a sample using spectrophotometry by first using several organic compounds to form a colored compound from the ion. The following data were collected. a) Construct a calibration plot, and determine the slope and intercept. b) What is the nitrite ion concentration in the unknown solution