TY - JOUR
AU - Knochen, Moisés
AB - A fast and efficient automated method using a sequential injection analysis (SIA) system, based on the Griess, reaction was developed for the determination of nitrate and nitrite in infant formulas and milk powder. The system enables to mix a measured amount of sample (previously constituted in the liquid form and deproteinized) with the chromogenic reagent to produce a colored substance whose absorbance was recorded.  For nitrate determination, an on-line prereduction step was added by passing the sample through a Cd minicolumn. 
The system was controlled from a PC by means of a user-friendly program. 
Figures of merit include linearity (r2 > 0.999 for both analytes), limits of detection (0.32 mg kg−1 NO3-N, and 0.05 mg kg−1 NO2-N), and precision (sr%) 0.8–3.0. Results were statistically in good agreement with those obtained with the reference ISO-IDF method. The sampling frequency was 30 hour−1 (nitrate) and 80 hour−1 (nitrite) when performed separately.
TI - A Simple Automated Method for the Determination of Nitrate and Nitrite in Infant Formula and Milk Powder Using  Sequential Injection Analysis
JF - Journal of Automated Methods and Management in Chemistry
DO - 10.1155/2011/148183
DA - 2011-09-25
UR - https://www.deepdyve.com/lp/pubmed-central/a-simple-automated-method-for-the-determination-of-nitrate-and-nitrite-z866qlTCu3
SP - 1
VL - 2011
IS - 
DP - DeepDyve
ER -