化工技术与开发
化工技術與開髮
화공기술여개발
TECHNOLOGY & DVELOPMENT OF CHEMICAL INDUSTRY
2015年
1期
32-33,48
,共3页
分光光度法%AHMT%乙二醛%甲醛
分光光度法%AHMT%乙二醛%甲醛
분광광도법%AHMT%을이철%갑철
spectrophotometry%AHMT%glyoxal%formaldehyde
在氢氧化钾溶液介质中，甲醛与4-氨基-3-联氨-5-巯基-1,2,4-三氮杂茂（简称AHMT）起缩合反应，高碘酸钾将缩合反应产物氧化成6-巯基-5-三氮杂茂﹝4,3-b﹞-S-四氮杂苯紫红色化合物，据此建立了分光光度法测定乙二醛中微量甲醛的新方法。最大吸收波长为554nm，吸光度变化值与甲醛浓度在0~1.4μg·mL-1范围内呈良好的线性关系，相关系数为0.9956，相对标准偏差为2.57%（n=6），加标回收率在95.8%~108.7%之间。
在氫氧化鉀溶液介質中，甲醛與4-氨基-3-聯氨-5-巰基-1,2,4-三氮雜茂（簡稱AHMT）起縮閤反應，高碘痠鉀將縮閤反應產物氧化成6-巰基-5-三氮雜茂﹝4,3-b﹞-S-四氮雜苯紫紅色化閤物，據此建立瞭分光光度法測定乙二醛中微量甲醛的新方法。最大吸收波長為554nm，吸光度變化值與甲醛濃度在0~1.4μg·mL-1範圍內呈良好的線性關繫，相關繫數為0.9956，相對標準偏差為2.57%（n=6），加標迴收率在95.8%~108.7%之間。
재경양화갑용액개질중，갑철여4-안기-3-련안-5-구기-1,2,4-삼담잡무（간칭AHMT）기축합반응，고전산갑장축합반응산물양화성6-구기-5-삼담잡무﹝4,3-b﹞-S-사담잡분자홍색화합물，거차건립료분광광도법측정을이철중미량갑철적신방법。최대흡수파장위554nm，흡광도변화치여갑철농도재0~1.4μg·mL-1범위내정량호적선성관계，상관계수위0.9956，상대표준편차위2.57%（n=6），가표회수솔재95.8%~108.7%지간。
A new determination method was builded for the trace formaldehyde in glyoxal by AHMT spectrophotometry. The con-densation reaction was happen between formaldehyde and 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole (AHMT) in potassium hy-droxide solution medium, the condensation reaction products oxidized by potassium periodate into 6-mercapto-5-triazole (4,3-b) –S-tetrazine purplish red compounds. The maximum absorption wavelength was at 554 nm, When formaldehyde content was 0~1.4μg/mL, it had a good linear relationship with absorbance. The correlation coefficient was 0.9956. The relative standard deviation was 2.57%(n=6), the recovery of standard addition was 95.8%~108.7%.
