Citation:
ZHAO Yan-Fang, NING Jin-Song, SHANG De-Rong, ZHAI Yu-Xiu, DING Hai-Yan, SHENG Xiao-Feng. Determination of Free Inorganic Cadmium Ions in Marine Bivalves by High Performance Liquid Chromatography-Inductively Coupled Plasma Mass Spectrometry[J]. Chinese Journal of Analytical Chemistry,
;2016, 44(8): 1277-1280.
doi:
10.11895/j.issn.0253-3820.160240
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A new method was established to determine the free inorganic cadmium ion (Cd2+) in marine bivalves using high performance liquid chromatography and inductively coupled plasma mass spectrometry (HPLC-ICP-MS). The free Cd2+ in shellfish was ultrasonic extracted for 40 min by 10 mmol/L Tris buffer solution (with 0.1 mol/L NaCl, pH=7.5), and the separation of Cd2+ was achieved using an IonPac CS5A analytical column with an IonPac CG5A guard column. The mobile phase consisted of 50 mmol/L C2H2O4 and 95 mmol/L LiOH. The new method had a good linear relationship with the correlation coefficient of 0.999 and the standard recoveries of Cd2+ were all above 84.6%. The free Cd2+ content in several kinds of marine bivalves was determined using the method and the results showed that the percentage of free inorganic Cd2+ to the total Cd content in samples with high Cd content was higher than those with low Cd content.
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