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产地 | |
品牌 | 甄准 |
货号 | |
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英文名称 | |
CAS编号 | |
保质期 | 个月 |
产品货号:mgz-k-acetak
产品品名:乙酸【ak法】检测试剂盒
英文品名:acetic acid(acetate kinase format) assay kit
规格型号:550次(170.5 ml)
analyser format for the specific assay of acetic acid (acetate) inbeverages and food products. on calibration, the prepared reagent islinear to > 28 micrograms of acetic acid per ml of assay solution.
introduction:
the most widely used method for enzymatic quantification of acetic
acid is that employing acetyl-coenzyme a synthetase (acs). however,
this method is based on the use of an indicator reaction catalysed by
l-malate dehydrogenase that is in permanent equilibrium, and therefore
a non-stoichiometric increase in absorbance is observed from the
acetate present in the sample. thus, a slightly non-linear response
to increasing acetate concentration is observed upon calibration,
resulting in poor r2 values. in addition (depending on the supplier)
reagents prepared for auto-analyser applications can have very limited
on-machine stability, due to rapidly increasing blank absorbance values.
to overcome these issues, megazyme developed this alternative acetic
acid kit, based on the enzyme acetate kinase (ak; see equations 1-3
below), especially for the auto-analyser user. this reagent has improved
on-machine stability, gives excellent linear calibration curves, and results
in a stoichiometric change in absorbance due to the acetic acid present
in the sample.
kits:
kits suitable for performing a minimum of 550 assays in auto-analyser
format are available from megazyme.
the kits contain the full assay method plus:
bottle 1: buffer (11 ml, ph 7.4) plus sodium azide (0.02% w/v ) as a
preservative. stable for > 2 years at 4°c.
bottle 2: nadh plus atp, pep and pvp.
stable for > 2 years at either 4°c or -20°c.
bottle 3: acetate kinase plus pyruvate kinase and d-lactate
dehydrogenase suspension, 4.1 ml.
stable for > 2 years at 4°c.
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