Abstract:

Objective: To investigate the chemical components of eri silkworm pupa that may influence its safety for
consumption. Methods: Chemical analysis was carried out on eri silkworm pupa by atomic fluorescence spectrometry and
titration method. Results: The contents of total arsenic, lead, and cadmium in eri silkworm pupa were (1.99 ± 0.84) mg/kg,
(0.14 ± 0.03) mg/kg, and (0.54 ± 0.14) μg/kg, respectively, and mercury was not detectable; the cassava cyanide content
in eri silkworm pupa was (0.33 ± 0.07) mg/kg for dry sample. After boiling, steaming, frying and microwave, the clearance
rate of cyanide was 100%, 78.83%, 26.78%, and 39.37%, respectively. The total volatile basic nitrogen (TVB-N) value of
eri silkworm pupa was (71.62 ± 5.32) mg/100 g. Conclusion: The contents of lead, cadmium, mercury and cyanide in eri
silkworm pupa are far lower than statutory limits, but the speciation of arsenic, freshness evaluation index and limits of
hazardous substances for eri silkworm pupa remain to be further investigated.

Key words: eri silkworm pupa, total volatile basic nitrogen, harmful elements, cyanide, edible