Research Article

Rapid Quantification of Melamine in Different Brands/Types of Milk Powders Using Standard Addition Net Analyte Signal and Near-Infrared Spectroscopy

Table 1

The original milk powder samples of 10 different batches.

NumberCodes of brands/typesTypesProduction date

1Q1Skimmed, regularMay 3, 2015
2Y1Semiskimmed, high-calciumApr. 13, 2015
3Q2Skimmed, regularMay 22, 2015
4M1Semiskimmed, regularJun. 7, 2015
5A1Whole, sweetMay 19, 2015
6Y2Whole, sweet, high-calciumApr. 15, 2015
7M2Whole, high-calciumJun. 7, 2015
8Y3Skimmed, regularMay 12, 2015
9M3Skimmed, high-calciumJun. 9, 2015
10Q3Whole, regularApr. 27, 2015

The term “regular” means no deliberate addition of calcium or other elements to the milk; the term “high-calcium” denotes addition of calcium to the samples by the producers; the term “sweet” denotes addition of sucrose.