Screening of saxitoxin in shellfish samples as low as 50ppb in sample Format: 25 tests (12 tests, 12 controls) Filters, syringes, extract collection tubes, buffers Run Time: 30 Minutes
Detail
Screening of saxitoxin in shellfish samples as low as 50ppb in sample
Saxitoxins (STXs) are naturally occurring alkaloids produced by some marine dinoflagellates and by strains of various species of freshwater cyanobacteria. Saxitoxin is one of the prevalent paralytic shellfish toxins (PSTs). It belongs to a family of potent neurotoxins with a molecular weight around 300 Da. Saxitoxin and its derivatives are alkaloids composed of a tetrahydropurine ring system with a highly polar guanidinium group. Due to their significant toxicity, saxitoxins are closely monitored in marine environments where they can accumulate in the food chain during harmful algal blooms (HABs). An action level of 800ppb, or 80ug per 100grams of shellfish, has been established.
Other Products
HCM023 Fraser Broth Base
Product Info
Document
Product Info
Introduction
Intended Use
For selective enrichment culture of Listeria monocytogenes in food.
Principle and Interpretation
Tryptone, proteose peptone, meat extract, yeast paste powder provide nitrogen sources, vitamins, amino acids, and growth factors; sodium chloride can maintain a balanced osmotic pressure; sodium dihydrogen phosphate and potassium dihydrogen phosphate as buffering agents; esculin are fermentable sugars; lithium chloride and other antibiotics can inhibit Gram negative bacteria and most Gram positive bacteria.
Formulation
Ingredients
/liter
Enzymatic digest of animal tissues ( Proteose peptone)
5.0g
Enzymatic digest of casein ( Tryptone)
5.0g
Meat extract
5.0g
Yeast extract
5.0g
Sodium chloride
20.0g
Disodium hydrogen phosphate dihydrate
12.0g
Potassium dihydrogen phosphate
1.35g
Aesculin
1.0g
Lithium chloride
3.0g
pH7.2±0.2 at 25°C
Preparation
Suspend 57.4g in 1 L of distilled or deionized water. Heat with frequent agitation and boil to completely dissolve the powder. Distribute into flasks. Autoclave at 121℃ for 15 minutes. Cool to 45-50℃,aseptically add the contents of 1 vial of Fraser Selective Supplement (SR0120) to each 225 mL of base to prepare FB1 solution; Add one reagent (SR0130) to each100 mL of FB2 culture medium to prepare FB2 enrichment solution.
Quality Control
Cultural characteristics observed after incubation at 35-37°C for 46~50 hours
2-30℃,Keep container tightly closed, avoid direct sunlight.
Use before expiry date on the label.
Precautions
1. When weighing the dehydrated medium, please wear masks to avoid causing respiratory system discomfort
2. Keep container tightly closed after using to prevent clumping.
Waste Disposal
Microbiological contamination was disposed by autoclaving at 121°C for 30 minutes.
Revision
On June 14, 2024
References
ISO 11290
Document
Intended Use For selective enrichment culture of Listeria monocytogenes in food. Principle and Interpretation Tryptone, proteose peptone, meat extract, yeast paste powder provide nitrogen ……
endo-BCN-PEG8-acid is a BCN-containing crosslinker reagent. The terminal carboxylic acid is reactive with primary amine groups in the presence of activators (e.g. EDC, or HATU). The BCN group enable copper free click chemistry with azide -tagged biomolecules. The hydrophilic PEG spacer increases solubility in aqueous media. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Document
endo-BCN-PEG8-acid is a BCN-containing crosslinker reagent. The terminal carboxylic acid is reactive with primary amine groups in the presence of activators (e.g. EDC, or HATU). The BCN group enable copper free click chemistry with azide -tagged biomolecules. The hydrophilic PEG spacer increases solubility in aqueous media. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.