การตรวจสอบความใช้ได้ของวิธีทดสอบปริมาณ แคดเมียม โครเมียม ตะกั่ว โมลิบดีนัมและนิกเกิลที่ละลายจากภาชนะหุงต้ม เหล็กกล้าไร้สนิม

Duangkamol Chaosrimud; Jitwilai Waluvanarak; Jirapan Roma; Nootjarin Phonhong

doi:10.60136/bas.v7.2018.225

Authors

Duangkamol Chaosrimud Department of Science Service
Jitwilai Waluvanarak Department of Science Service
Jirapan Roma Department of Science Service
Nootjarin Phonhong Department of Science Service

DOI:

https://doi.org/10.60136/bas.v7.2018.225

Keywords:

Stainless steel cookwares, Cadmium, Chromium, Lead, Molybdenum, Nickel

Abstract

Determination of released cadmium, chromium, lead, molybdenum and nickel from stainless steel cookwares by ICP-OES was validated according to the analytical method of metals and alloys used in food contact materials and articles: a practical guide for manufacturers and regulators by ICP-OES. Results showed that linear range of cadmium was 0.05-1.0 mg/L while chromium, lead, molybdenum and nickel were 0.5-10 mg/L. The limit of detection of cadmium, chromium, lead, molybdenum and nickel were 0.4, 0.8, 3.3, 3.0 and 0.8 ug/L. The limit of quantitation of cadmium was 0.05 mg/L and the others were 0.5 mg/L.% Bias and intermediate precision showed that percentage recovery and relative pooled standard deviation of all elements were 97.8-118.4 and 0.95-6.36, respectively. Measurement uncertainty at 95% confident limit of all elements was less than 20%.

References

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