How To Preserve Chemicals, Samples And Send Samples

In order to ensure the quality of chemicals, swabs and especially samples of helminths, such as blood, stool, and urine samples, until the testing techniques produce accurate results, they We need to have proper storage methods that do not affect the quality of the test.
How to preserve enzymes
Plasma samples used to measure enzyme activity generally can be stored at 4ᵒC for 5 days, the enzyme activity will not drop more than 10%. Particularly for LDH, do not store in the refrigerator because its activity decreases, its isoenzymes LDH4 and LDH5 are not stable in cold conditions. Acid phosphatate is stable only when plasma samples are acidified.
How to preserve substrates
The metabolites in serum or plasma are usually stable at 4ᵒC for 6 days, the concentration does not change significantly. Particularly for Triglycerides may be reduced due to hydrolyzed lipase. However, this concentration will not change if the method is analyzed through total glycerol.
Storage at room temperature may reduce the concentration of phosphate, uric acid and creatinine if the determination is based on a Jaffé reaction

Bilirubin is destroyed when light is exposed during storage Glucose is only stored after separating the plasma or serum from the blood sample or adding a stabilizer.
How to protect proteins, antigens and antibodies
Proteins, antigens and antibodies can be stored at 4ᵒC for one week.


How To Preserve Chemicals, Samples And Send Samples

.
How to preserve hormones and cancer markers
Steroid hormones, relatively durable cancer markers, can be stored at room temperature (25ᵒC) for up to 3 days. Peptide hormones that need to be stored for more than a day must be stored in a deep refrigerator. Particularly unstable hormones are ACTH, renin, insulin, GH and calcitonin.
How to preserve samples for a long time
If specimens are to be stored for longer than the above period, the specimens should be frozen at a temperature below -20ᵒC. When needed, samples should be thawed slowly at 4-8ᵒC overnight or in a shaking bath
However, thawing and thawing should not be repeated
Note: for whole blood samples, before performing storage at negative temperature, it is necessary to perform serum and plasma separation
How to preserve urine for urine sediment testing
Urine residues must be evaluated for results in about 2-3 hours. Do not store urine samples in a refrigerator or freezing as refrigerated conditions can cause salt precipitation.
How to preserve stool samples
Sample type Purpose of use Storage conditions Storage time Storage equipment Notes
Manure Parasite / bacterial detection 18-30ᵒC <24 hours Sampling bottle Detects parasites, samples mixed with formaline 10% or PVA in a 3: 1 ratio Used for other diagnostic tests 4-8ᵒC> = 24 hours Vials
-20ᵒC or -70ᵒC <24 hours Sampling bottle For molecular biology testing only Rectal stool swabs Samples for all diagnostic tests -20 hoặcC or -70ᵒC> = 24 hours Rectal swabs in specialized transport media Only for molecular biology testing
How to preserve blood to measure blood gas and how to balance acid - base
The determination of blood gases and the acid-base balance of arterial or capillary blood should be avoided in air and should be performed immediately. If this is not done immediately, the blood sample may be placed in ice for a maximum of 2 hours.


How To Preserve Chemicals, Samples And Send Samples

.
How to send samples, stool samples
When sending samples from one place to another in the country or internationally, the specimen should be stored in a dry stone thermos. In general, the change in enzyme activity and metabolite concentration does not exceed ± 10% in about 2 days, if the sample storage temperature is below 25ᵒC.
Note: The samples sent must follow the packaging principle to ensure biosecurity.
KTV KHONG VY.

. Dịch vụ: Thiết kế website, quảng cáo google, đăng ký website bộ công thương uy tín

Related news

  • Parasitical Worms.com Tests to find the cause of urticaria, diagnosis of urticaria results will be available throughout the day. After the results the doctor will explain, point out the abnormal signs for your child to understand and he will prescribe medication for home. Question Hello doctor: I ...
  • Parasitical Worms.com Adult flukes are very small, 3 - 6 mm long, with 4 suction heads and a double hook, very short neck; coal consists of 3 segments, the final flukes have several hundred eggs, size 45 x 35 mcm, very similar to Toenia spp eggs. The disease is caused by the larva Echinococcus ...
  • Parasitical Worms.com Some diseases caused by larvae of the anisakinae family parasitize marine mammals. In humans, the parasite falls into a dead-end, or severe or severe illness depending on the place of parasite, number of larvae and tissue responses. Diagnosis is often difficult and the most ...
  • Parasitical Worms.com Illness caused by the nematode of Angiostrongylus cantonensis parasitizes and causes disease in the meninges, invasion of the brain can lead to death. Commonly called Meningitis - brain caused by Angiostrongylus cantonensis. The causative agent of nematode ...
  • Fascioliasis is two types of fascioliasis and small liver fluke. People are infected with food, skin. Flukes can cause hepatitis, liver tumors, liver necrosis, but fortunately, liver fluke can be cured if detected early, treated in a reputable facility with a good doctor, using drugs. Good, ...
  • Parasitical Worms.com Diagnosis is determined by seeing sparganum larvae from the wound. Clinical and prehistoric images of frog meat, eye-copying as well as the habit of eating undercooked snakes, mice, and eels are important factors for diagnosis. Doctor: Le Thi Huong Giang Medical Consultation: ...
  • MUSHROOM DISEASE (Aspergillus) 1. Epidemiology. Aspergillus fungus is one of the largest fungal strains, present in all over the world, there are about 100 species, currently there are about 20-30 species that cause disease in humans, important strains are A. fumigatus, A. flavus , A. niger such as ...
  • MUSHROOM DISEASE Cryptococcosis (Tolurosis, European Blastomycois) 1. Etiology and epidemiology Cryptococcosis is also known as the European Blastomycose mycosis caused by Cryptoccocus neoformans, a thick cystic yeast, has serotypes A, D (C. neoformans var. Neoformans) and B, C ( C.neoformans var. ...
  • MUSHROOM DISEASE Sporotrichosis (Gardener Disease) 1. Epidemiology and etiology Sporotrichosis is a chronic disease caused by Sporothrix schenckii that causes damage to the skin or internal organs (also known as gardener disease - gardener's disease). This is a dimorphic mushroom. In nature, ...
  • CANDIDA MUSHROOM 1. Germs Candidiasis is an acute, subacute or chronic disease caused by Candida-like yeasts, mostly Candida albicans. Candidiasis is available in the body (bronchus, oral cavity, intestine, vagina, skin around the anus) normally in non-pathogenic form. When having favorable ...