陶磁器製食器からの重金属の溶出とその対策(第1報) : 磁器製食器の絵付転写紙と釉薬からの溶出

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[Author abstract]Heavy metals and arsenic sometimes have been found by extraction with diluted acetic acid from ceramic and porcelain table wares. In the present investigation, these harmful substances extracted from 69 kinds of the decalcomania papers and several kinds of the glazes were analyzed by atomic absorption spectrometry and examined on causal connection between the major colors of these papers and glazes, and the extracted metals. The results were as follows: 1. Lead amount extracted from the decalcomania paper by 4% acetic acid at 25℃ for 24 hours was 90.2% of the amount, extracted by the acid at 100°C for an hour. Both data seems to serve for a purpose of quality control of lead in the paper. 2. The enamel colors of the decalcomania papers contained lead in amount 1.2 to 21.0%. Lead amount extracted by 10% acetic acid from the enamel colors was 2.3 times the amount extracted by 4% acetic acid. 3. The contents of copper, zinc, and arsenic extracted by 4% acid from the enamel colors were 0.0007 to 0.116%, 0.05 to 1.60% and 0.03 to 7.0mg% of the samples respectively. 4. The major colors of these papers from which the extracted amounts of heavy metals and arsenic were more than certain level listed in the following. Lead, more than 15%: green, blue, white red or reddish orange. Cadmium, more than 2%: white or blue. Zinc, more than 1%: green or reddish-dark yellowish red. Arsenic, more than 0.005%: green or weak yellow. Copper, more than 0.1%: black or dark yellowish red. The colors of the glazes which the extracted lead were more than 37% were dark blue and blue. 5. In addition, the names of the decalcomania papers contained more than certain level of heavy metals and arsenic were described. In 1972, amounts of the harmful substances in these papers were found to be on the decrease.[著者抄録]磁器製食器に使用する上絵の転写紙からの重金属の溶出状況、転写紙、釉薬の主色相や銘柄などと溶出金属量との関係を調査して次の結果をえた。1.転写紙よりのPbの溶出は4%酢酸溶液で沸とう水溶上40min～1hrの浸出で、実用上一定値に安定した。25℃、24hrs浸出ではその90%が溶出した。これらの値は転写紙間の溶出量の比較や品質管理に役立つものとみられる。転写紙顔料のPb溶出は4%酢酸酸溶液で1.2～21%であった。10%酢酸溶液を用いて同一条件で浸出すると前者の2.3倍のPbを溶出した。2.同一条件で、Cuは0.0007～0.116%、Znは0.05～1.6%、Asは0.04～3.3mg%であった。3.転写紙絵柄の主な色相と溶出重金属量との関係では、その顔料中Pb10～15%以上溶出紙は緑、青、淡赤、赤燈、赤紫で、Cd2%以上溶出紙は白、青で、Zn1%以上紙は緑、赤褐、Asmg%以上紙は緑、黄土、Cu0.1%以上紙は黒、褐であった。4.釉薬のPb分析ではその色相が濃青、淡青のものが40%前後で、褐、濃緑からは検出されなかった。5.比較的多量の重金属やAsを溶出した転写紙の銘柄についても記述した。6.1972年の転写紙は重金属の多いものが例年より減少していた。これは当業界の食品衛生上の配慮を示すものとみられる。(近畿大農学部食品栄養学科食品衛生学研究室報告No.3総報告No.6)
1975-03-15

陶磁器製食器からの重金属の溶出とその対策(第1報) : 磁器製食器の絵付転写紙と釉薬からの溶出

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