TY - GEN AU - Silva,M AU - Valcárcel,M TI - Spectrophotometric determination of microgram amounts of calcium in waters and foods using diphenylglyoxal bis(2-hydroxybenzoyl hydrazone) SN - 0003-2654 PY - 1980///0923 KW - Aldehydes KW - Calcium KW - analysis KW - Food Analysis KW - Hydrazones KW - Indicators and Reagents KW - Microchemistry KW - Phenylglyoxal KW - analogs & derivatives KW - Spectrophotometry KW - methods KW - Water N1 - Publication Type: Journal Article UR - https://doi.org/10.1039/an9800500193 ER -