Beta葡聚糖[混联]检测试剂盒 β-Glucan Assay Kit (Mixed Linkage) 货号：K-BGLU Megazyme中文站

Beta葡聚糖[混联]检测试剂盒

英文名：β-Glucan Assay Kit (Mixed Linkage)

货号：K-BGLU

规格：100 assays per kit
市场价： 4452元

应用范围：

食品检测

酿造业检测

饲料检测

数量：

件

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分析物意义：大麦和燕麦的主要细胞壁多糖

Megazyme检测试剂盒优点：反应迅速、试剂稳定，只有酶检测试剂盒可用。 AOAC方法 995.16; AACC 方法 32-23

AACC Method 32-23.01, AOAC Method 995.16, EBC Methods 3.11.1, 4.16.1 and 8.11.1, ICC Standard No. 166 and RACI standard method for the measurement of 1,3:1,4-ß-D-glucan in cereal grains, milling fractions, wort and beer. Recommended/Standard procedure of the Association of Official Analytical Chemists (AOAC), American Association of Cereal Chemists (AACC), Royal Australian Chemical Institute (RACI), European Brewing Convention (EBC), and International Association for Cereal Science and Technology (ICC). Content:100 assays per kit

Colourimetric method for the determination of β-Glucan in
cereal grains, feed, foodstuffs, beverages and other materials

Principle:
(lichenase)
(1) β-Glucan + H₂O → β-gluco-oligosaccharides

(β-glucosidase)
(2) β-Gluco-oligosaccharides + H₂O → D-glucose

(glucose oxidase)
(3) D-Glucose + H₂O + O₂ → D-gluconate + H₂O₂

(peroxidase)
(4) 2H₂O₂ + p-hydroxybenzoic acid + 4-aminoantipyrine →
quinoneimine + 4H₂O

Kit size:                            100 assays
Method:                            Spectrophotometric at 510 nm
Total assay time:              ~ 100 min
Detection limit:                 0.5-100% of sample weight
Application examples: 
Oats, barley, malt, wort, beer, food and other materials
Method recognition:     
AOAC (Method 995.16), AACC (Method 32-23.01), EBC (Methods
3.10.1, 4.16.1 and 8.13.1), ICC (Standard No. 166), RACI (Standard
Method) and CODEX (Type II Method)

Advantages

Very cost effective
All reagents stable for > 2 years as supplied
Only enzymatic kit available
Very specific
Simple format
Mega-Calc™ software tool is available from our website for hassle-free raw data processing
Standard included

FAQ解答

Q1. Should the pH of the sample be adjusted even for samples in acidic media?

The pH of the assay solution after the sample is added should be the same as that of the assay buffer that is supplied with the kit.
Low sample volumes (e.g. 0.1 mL) are not likely to affect the pH of the assay solution and therefore may not require pH adjustment.
Samples above 0.1 mL are more likely to affect the pH of the assay solution and therefore the pH of these samples should be adjusted as described in the data booklet, prior to addition to the assay.

Q2. There is an issue with the performance of the kit; the results are not as expected.

If you suspect that the Megazyme test kit is not performing as expected such that expected results are not obtained please do the following:

Ensure that you have tested the standard sample that is supplied with the Megazyme test kit.
Send the results of the kit standard, blank samples and the results obtained for your sample, in the relevant MegaCalc spreadsheet (if available) to Megazyme (cs@megazyme.com). Where available the relevant MegaCalc spreadsheet can be downloaded from where the product appears on the Megazyme website.
State the kit lot number being used (this is found on the outside of the kit box).
State which assay format was used (refer to the relevant page in the kit booklet if necessary).
State exact details of any modifications to the standard procedure that is provided by Megazyme.
State the sample type and describe the sample preparation steps if applicable.

Q3. We have measured the molecular weight of beta-glucan originating from barley ordered from your company. Can you please tell us which method have you used for measuring molecular weight?

The MW’s were determined by Multiangle laser light scattering technique.

Q4. I have purchased barley beta-glucan (lot 30108) and carob galactomannan low viscosity (lot 30702) and would like to know what else there might be in these substrates.

Barley beta-glucan lot 30108 would contain about 3-4% arabinoxylan (this was produced in 1993). Material supplied post 1995 contains < 0.5% arabinoxylan. Carob galactomannan is quite pure (> 96%).

Q5. Although not specified on the beta-glucan data sheet, is the ratio of 1-3 to 1-4 bonds measured? If so, what is the ratio and would you expect it to remain standardised over a number of different batches?

The content of 1,3 bonds in barley beta-glucan is about 32% (from literature). We would not expect this to change much (if at all) over different batches.

Q6. Both substrates; barley beta-glucan and wheat arabinoxylan, are standardised to a specific viscosity, e.g. 23-24 cSt. Are the substrates adjusted to give this viscosity?

The substrates are enzymically treated to yield the required viscosity (20 ~ 30 cSt). Modification of the viscosity of beta-glucan is required for IOB viscometric malt beta-glucanase test (which works well).

Q7. We are setting up reducing-sugar assays for both beta-glucanase and xylanase from different fungal origins. Which barley beta-glucan do you recommend for the glucanase assay.

For glucanase assay we recommend the medium viscosity beta-glucan. We now offer low, medium and high viscosity wheat arabinoxylans, and we think that the low viscosity material will be best (easiest) to use in the reducing-sugar assay.

视频

Megazyme β-葡聚糖（混联）检测试剂盒操作视频（K-BGLU）

Megazyme 溶解淀粉操作视频

Megazyme 试剂盒样品前处理准备操作视频

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: Beta葡聚糖[混联]检测试剂盒
100 assays per kit

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应用分类
食品检测	饲料检测	发酵业检测	红酒业检测	酿造业检测	奶制品检测	生物燃料	食物育种	实验室分析	研究

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FAQ解答

Q1. Should the pH of the sample be adjusted even for samples in acidic media?

Q2. There is an issue with the performance of the kit; the results are not as expected.

Q3. We have measured the molecular weight of beta-glucan originating from barley ordered from your company. Can you please tell us which method have you used for measuring molecular weight?

Q4. I have purchased barley beta-glucan (lot 30108) and carob galactomannan low viscosity (lot 30702) and would like to know what else there might be in these substrates.

Q5. Although not specified on the beta-glucan data sheet, is the ratio of 1-3 to 1-4 bonds measured? If so, what is the ratio and would you expect it to remain standardised over a number of different batches?

Q6. Both substrates; barley beta-glucan and wheat arabinoxylan, are standardised to a specific viscosity, e.g. 23-24 cSt. Are the substrates adjusted to give this viscosity?

Q7. We are setting up reducing-sugar assays for both beta-glucanase and xylanase from different fungal origins. Which barley beta-glucan do you recommend for the glucanase assay.

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