Product details

Determination of the microbial count

Determination of the microbial count

Item no.: P4140400

Experiment Type: Teacher Experiment, Laboratory Experiment

Expenditure of Time print
  • Description
  • Scope of Supply
  • Downloads and Documents
Principle

The microbial count is the number of viable microorganisms in one millilitre or gramme of the material to be examined, e.g. water, soil, milk, ice cream, etc. It is of high practical importance for the analysis of drinking water, soil, and foodstuffs. The
microbial count can only be determined exactly if all of the related tasks are performed in a way that prevents the material that is to be examined from being contaminated with foreign microorganisms.

Benefits

  • Experiment is part of a series of complementary microbiology experiments
  • Equipment of this experiment can also be used to perform other experiments from the series

Tasks

  • Determine the microbial count of the sample.

What you can learn about

  • Microbial count
  • Microorganisms
  • Analysis of drinking water
Device Name Item no. Qty
Methylene-blue B, for microsco 31567-04 1,00
Petri dish, d 100 mm 64705-00 12,00
Ethyl alcohol, absolute 500 30008-50 1,00
Beaker, 600 ml, high-form 46029-00 1,00
Sterile stoppers f. id 15mm, 250 39266-00 1,00
Graduated pipette, 1 ml 36595-00 2,00
Wire gauze with ceramic, 160 x 160 mm 33287-01 1,00
Water jet pump, plastic 02728-00 1,00
Water, distilled 5 l 31246-81 1,00
Tweezers,straight,pointed,120mm 64607-00 1,00
Glass rod,boro 3.3,l=300mm, d=7mm 40485-05 1,00
Test tube rack for 12 tubes, holes d= 22 mm, wood 37686-10 1,00
Watch glass, dia.60 mm 34570-00 4,00
Peptone,dry,from meat 5 31708-05 1,00
Membrane filter apparatus, 250 ml 64906-00 1,00
Glycerol, 250 ml 30084-25 1,00
Formaldehyde sol. ca.35% 500 48146-50 1,00
Sterile stoppers f. id 29mm, 100 39267-00 1,00
Graduated pipette 10 ml 36600-00 1,00
Tripod,ring d=140 mm, h=240 mm 33302-00 1,00
Heating + cooking hotplate,230V 04025-93 1,00
Immersion oil, 50 ml 31381-05 1,00
Cover glasses 18x18 mm, 50 pcs 64685-00 10,00
Bottle,nar.mouth,250ml,clear,p.st 41102-01 4,00
Laboratory pen, waterproof, black 38711-00 1,00
Erlenmeyer flask, narrow neck, 500 ml 36121-00 2,00
Bunsen burner, natural gas,w.cock 32167-05 1,00
Membrane filters, d = 50 mm, 0.45 µm, 100 64907-00 1,00
pH test sticks 6.5-10, 100 sticks 30301-04 1,00
Compact Balance, OHAUS TA 302, 300 g / 0.01 g 49241-93 1,00
Safety gas tubing, DVGW, sold by metre 39281-10 1,00
Graduated cylinder 100 ml 36629-00 1,00
Spatula, double blade, 150 mm 33460-00 1,00
Autoclave with insert 04431-93 1,00
Meat extract 1 31521-03 1,00
Microscopic slides, 50 pcs 64691-00 1,00
Stopper, IGJ 19/26,glass,clear 41252-10 4,00
Rub.stop.d=49/41,1 hole 15mm 39263-15 1,00
Pipettor 36592-00 1,00
Circular filter,d 90 mm,100 pcs 32977-03 1,00
Nutrient discs,standard, 10 64908-03 1,00
Agar-agar, powdered 10 31083-10 1,00
Universal oven, 32 liters, 230 V 49559-93 1,00
Rubber tubing,vacuum,i.d.6mm 39286-00 1,00
Test tube, 160 x 16 mm, 100 pcs 37656-10 1,00
Filter flask, 1000ml, PN 45 34421-01 1,00
OPTIKA Binocular student microscope B-159R-PL, 1000x, mechanical stage OPT-B-159R-PL 1,00
Document     Filesize
p4140400e.pdf Experiment guide, English 282.79 KB

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