Abu (analisis kimia)

Dalam analisis kimia, pengabuan adalah proses mineralisasi untuk zat prekonsentrasi demi kepentingan analisis kimia. Abu adalah nama yang diberikan pada semua residu non-cair yang tersisa setelah sampel dibakar, dan sebagian besar terdiri dari oksida logam.

Abu adalah salah satu komponen dalam analisis proksima dari material biologis, yaitu bagian yang menjadi penjumlah utama dalam persentase hasil analisis. Misalnya, abu dalam madu adalah sebesar 0,17%. Dalam hal ini, abu yang dihasilkan termasuk semua mineral yang terkandung dalam madu.

Abu umumnya terdiri dari garam-garaman, material anorganik (misal garam-garaman yang mengandung ion Na+, K+, dsb). Terkadang juga mengandung mineral unik tertentu, misalnya klorofil dan hemoglobin.

Contoh abu:

Referensi


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