By using acetyl acetone as color reagents, the micro-formaldehyde can be determined at the point of 412nm with spectrophotometry. 用乙酰丙酮作显色剂 ,在 412nm处 ,用分光光度法可测定微量甲醛。
The ionic strength buffer solution is 0.12mol/L TEA hydrochloric acid solution of 0.1mol/L KC1-PH=7. The interference camouflaging agent is 0.004mol/L acetyl acetone. 离子强度调节缓冲液为0.
Methods That taurine reacting with formaldehyde and acetyl acetone forming a stable colored-compound was used to determine the content of taurine by spectrophotometry. 方法根据在一定的条件下，牛磺酸与乙酰丙酮和甲醛反应生成带色的配合物，建立了测定牛磺酸的吸光光度法。
Under the situation of phosphonic acid, the extraction of formaldehyde in dried bean milk cream was carried out by distilling and the formaldehyde was determined by acetyl acetone spectrophotograhy. 磷酸酸化条件下对腐竹样品进行蒸馏,采用乙酰丙酮分光光度法测定甲醛残留量。