Polar pesticides/contaminants in green tea

Ring test P2726-RT is designed to cover the most frequent polar pesticides and contaminants in green tea. 

The test material consists of green tea (milled, 100 g), spiked with

• anthraquinone,
• biphenyl,
• chlorate and perchlorate,
• nicotine,
• glyphosate, AMPA,
• diquat and paraquat,
• matrine and oxymatrine,
• 2-chloroethanol / ethylene oxide,
• difluroacetic acid (DFA), trifluoroacetic acid (TFA), and
• inorganic bromide.

The basic module (anthraquinone, biphenyl, chlorate, perchlorate, and nicotine) is included in the price of the ring test. The participants are free to choose the additional modules glyphosate, and AMPA (module 1), diquat and paraquat (module 2), matrine and oxymatrine (module 3), ethylene oxide (module 4), difluroacetic acid and trifluoroacetic acid (module 5), and inorganic bromide (module 6). 

The analytical data are assessed with respect to

• the comparability (z-score), and
• the trueness (70 to 120% of the spiked level, as far as scientifically reasonable).