Gentaur Buffer Standard pH 11.00 at 20°C ISO 17034 Certified Reference Material - 1l
https://www.e-photosynthesis.org/shop/fm-07-crm1110-gentaur-buffer-standard-ph-11-00-at-20degc-iso-17034-certified-reference-material-1l-26424
https://www.e-photosynthesis.org/web/image/product.template/26424/image_1920?unique=89b0bed
Certified alkaline buffer standard for pH 11.00 calibration.
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