Determination of 18 Elements in Food Baking Paper by Inductively Coupled Plasma Mass Spectrometry
An analytical method for simultaneous determination of 18 elements(arsenic,boron,barium,beryllium,cadmium,cobalt,chromium,copper,gallium,manganese,nickel,lead,antimony,tin,strontium,titanium,thallium and vanadium)in food baking paper by inductively coupled plasma mass spectrometry was established by screening sample pretreatment methods and optimizing instrument conditions.The method was validated and the results showed that the mass concentrations of the 18 elements had good linearity with the mass spectrometry response values.The correlation coefficients of the standard curves were greater than 0.999 except for boron(0.996 9).The detection limits of the elements were 0.000 05～0.180 00 mg·kg-1,the sample spike recoveries were 92.5%～102.6%,and the relative standard deviations were 1.15%～6.08%(n=7).Sampling and testing of 14 batches of commercially available food baking paper samples showed that the content of barium,manganese and copper in food baking paper was relatively high,all arsenic levels met national standards,and the lead content of one batch exceeded the limit by 10 times.
food baking paperheavy metalsinductively coupled plasma mass spectrometrymicrowave digestion
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