Rapid detection of economic adulterants in fresh milk by liquid chromatography–tandem mass spectrometry

Rapid determination of trace dicyandiamide in mussels from Zhejiang coast by ultra-fast liquid chromatography–tandem mass spectrometry with isotope internal standard dilution technique

“…Though Raman chemical imaging is suited for the screening of large-volume food samples, it performs poorly in the detection of trace amounts of DCD (Qin et al 2013). Mass spectrometry (MS) detectors are becoming the most commonly used methods of detecting DCD residue (Chen et al 2013;Abernethy and Higgs 2013). MS detectors are replacing ultraviolet detectors (UV) and Raman chemical imaging because they provide more structural information and can conform to the specifications for confirmatory methods included in Commission Decision 2002/657/EC.…”

“…In September 2012, the presence of DCD (C 2 H 4 N 4 ) in powdered milk has been reported in New Zealand, where the dairy farms are under increasing pressure to reduce nitrogen (N) discharges to the environment because of growing concerns over increasing nitrate trends in waterways, particularly those in intensively farmed catchments. Thereafter, more and more studies using analytical methods for the determination of DCD in dairy products have been reported (Chen et al 2013;Abernethy and Higgs 2013;Qin et al 2013;Yun et al 2013). Unluckily, there is no attention on the DCD pollution of rivers, seas, and seafood.…”

“…Different analytical methodologies have been proposed for the identification and quantification of DCD in milk (Chen et al 2013;Abernethy and Higgs 2013;Qin et al 2013;Yun et al 2013). However, cost and effectiveness are becoming an important issue for all laboratories involved in DCD residue analysis.…”

Lactose semicarbazone as a marker for semicarbazide adulteration in milk

“…Such adulteration creates food safety, ethical and legal implications. To help ensure the integrity of the milk supply, a surveillance method has been developed using the targeted detection of nitrogen-rich potential adulterants in milk by liquid chromatography-mass spectrometry (LC-MS) [2]. This short communication details improvements in the detection of semicarbazide adulteration using the LC-MS surveillance method.…”

Desenvolvimento de procedimentos analíticos explorando microextração líquido-líquido em fluxo para a determinação de espécies de interesse em águas e leite

“…Dentre as principais análises de controle de qualidade de leite estão as microbiológicas e a avaliação dos sólidos presentes, sendo avaliados os teores de proteínas e de gorduras, que definem a remuneração ao fornecedor [58]. A legislação estabelece o teor de proteína em 2,9 % (m/m) [59].…”