Study on the influence of composition and ratio of feed microwave digestion solution on digestion efficiency
Aiming at the detection of lead content in feed,microwave digestion method was used to pre-treat feed,and the in-fluence of different composition and ratio of digestion solution on the digestion result was mainly studied,so as to explore the u-niversal digestion solution for various feeds,and promote the microwave digestion method to be listed as one of the pre-treat-ment methods for the detection of lead content in national standard feed.The experimental results showed that the digestion so-lution consisted of 8 mL HNO3+2 mL HF and 8 mL HNO3+2 mL HF+12 mL boric acid,respectively had very ideal or rela-tively ideal digestion effects on eight among ten kinds of feeds and feed additives studied in this work.The precipitation(or floc)could be removed thoroughly or only a very small amount of sediment(or floc)was retained.After comprehensive considera-tion,the digestion solution containing 8 mL HNO3+2 mL HF was finally selected as the most universal digestion solution,which could ensure complete and thorough digestion.
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