1000 ppm Calcium for AA
https://www.minstrument.com/shop/ios-1153-500ml-1000-ppm-calcium-for-aa-57991
https://www.minstrument.com/web/image/product.template/57991/image_1920?unique=48e7db8
High-purity 1000 ppm Calcium Calibration Standard optimized for repeatable AA spectroscopy in environmental, agricultural, and industrial quality control labs. Size: 500mL
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